Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request

To: Jeremy Fitzhardinge <jeremy@goop.org>, 597828@bugs.debian.org
Cc: Timo Juhani Lindfors <timo.lindfors@iki.fi>
Subject: Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request
From: Ian Campbell <ijc@hellion.org.uk>
Date: Fri, 24 Sep 2010 09:07:58 +0100
Message-id: <[🔎] 1285315678.15518.1977.camel@localhost.localdomain>
Reply-to: Ian Campbell <ijc@hellion.org.uk>, 597828@bugs.debian.org
In-reply-to: <[🔎] 4C9BCC98.7090608@goop.org>
References: <[🔎] 84bp7oznjb.fsf@sauna.l.org> <[🔎] 1285276010.15518.1963.camel@localhost.localdomain> <[🔎] 4C9BCC98.7090608@goop.org>
On Thu, 2010-09-23 at 14:54 -0700, Jeremy Fitzhardinge wrote: 
> On 09/23/2010 02:06 PM, Ian Campbell wrote:
> > Looks like SysRQ-t somehow causes an RCU stall, which may be a bug in
> > its own right (or maybe SysRQ-t is just slow?), but the eventual BUG is
> > because the RCU call causes arch_trigger_all_cpu_backtrace to be called
> > which, on x86, accesses the APIC directly to send an IPI to every CPU
> > which won't work under Xen.
> >
> > I guess the right thing to do would be to using some existing paravirt
> > interface to send the IPI instead of tweaking the APIC directly, or if
> > necessary to add such an interface, Jeremy, what do you think? Is there
> > an existing interface we could use?
> 
> It looks like a regular cross-cpu call to me.  Don't know why it needs
> special IPI magic.  OIC, its an NMI.  Well, we'd need to add something
> to replicate that as-is (can you send an NMI in Xen?).

NMI injection on 2.6.18 was one of the first Xen things I worked on (for
injecting h/w NMI button faults) so something worked once upon a time. I
can see CALLBACKTYPE_nmi and VCPUOP_send_nmi which seems promising that
it's still around (and extended since I didn't do VCPUOP_send_nmi), even
if its bit-rotted or not made it to pvops yet. 

In 2.6.18-xen the guest side of receiving an NMI was pretty ugly IIRC
since we needed to force a return via the iret hypercall (to allow the
hypervisor to simulate the NMI interrupt window).

There is a small amount of residual support even in pvops
(XEN_EFLAGS_NMI is defined, and tested once on 32 bit, but never set).
It might be possible to do something nicer with all the pvops
infrastructure, I'm also not sure it isn't a premature optimisation to
save a compare by putting the NMI flag into a reserved bit of the saved
EFLAGS anyway.

Ian.

> 
>     J
> 
> 
> > Timo, (this may not be as useful as I first though since I didn't twig
> > that you were using sysrq-t not sysrq-l, which causes the
> > arch_trigger_all_cpu_backtrace issue directly, until just now, I leave
> > it in since I've already typed it)... you may find the xenctx tool
> > useful as a workaround you can run it in domain 0 (usually it is
> > installed in /usr/lib/xen*/bin/xenctx) giving it the guest's System.map,
> > a domid and a vcpu id and it will give you a stack trace for that VCPU.
> > e.g. domain 5 vcpu 0: 
> >         # xenctx -s /boot/System.map-2.6.32.21-x86_32p-xenU-00969-gb297cda 5 0
> >         cs:eip: 0061:c10013a7 _stext+0x3a7 
> >         flags: 00001246 i z p
> >         ss:esp: 0069:c12d3f8c
> >         eax: 00000000	ebx: deadbeef	ecx: deadbeef	edx: 00000004
> >         esi: c12f15f0	edi: c12db074	ebp: c12d3f9c
> >          ds:     007b	 es:     007b	 fs:     00d8	 gs:     0000
> >         Code (instr addr c10013a7)
> >         cc cc cc cc cc cc cc cc cc cc cc cc cc cc b8 1d 00 00 00 cd 82 <c3> cc cc cc cc cc cc cc cc cc cc 
> >         
> >         
> >         Stack:
> >          c1006528 00000000 c12f15f0 c12db074 c12d3fa4 c10034a9 c12d3fb4 c1007cae
> >          c1319d88 c13191f0 c12d3fbc c11e71cf c12d3fcc c12f384c c1319d88 40000000
> >          c12d3fd8 c12f30a2 40000000 c12d3ffc c12f6445 1f898975 80000201 01040800
> >          000006fb 00000000 c19ca000 00000000 00000000
> >         
> >         Call Trace:
> >           [<c10013a7>] _stext+0x3a7  <--
> >           [<c1006528>] xen_safe_halt+0x12 
> >           [<c10034a9>] xen_idle+0x5d 
> >           [<c1007cae>] cpu_idle+0x5b 
> >           [<c11e71cf>] rest_init+0x53 
> >           [<c12f384c>] start_kernel+0x309 
> >           [<c12f30a2>] i386_start_kernel+0x91 
> >           [<c12f6445>] xen_start_kernel+0x524 
> >         
> >
> > On Thu, 2010-09-23 at 14:50 +0300, Timo Juhani Lindfors wrote: 
> >> Package: linux-2.6
> >> Version: 2.6.32-23
> >> Severity: minor
> >>
> >> [ Note that this bug is against a kernel that has been modified to add
> >> debugging options. I report it to debian only because I was suggested
> >> so on #debian-kernel.]
> >>
> >> Steps to reproduce:
> >> 1) To debug #580889 I rebuilt the kernel with various debug options:
> >>
> >> $ diff -u /boot/config-2.6.32-5-amd64 /boot/config-2.6.32-5+lindi.1-amd64 |grep -v "#"
> >> --- /boot/config-2.6.32-5-amd64 2010-09-18 01:11:39.000000000 +0300
> >> +++ /boot/config-2.6.32-5+lindi.1-amd64 2010-09-22 20:08:55.000000000 +0300
> >> @@ -1,7 +1,7 @@
> >>  CONFIG_64BIT=y
> >> @@ -133,7 +133,7 @@
> >>  CONFIG_UID16=y
> >>  CONFIG_SYSCTL_SYSCALL=y
> >>  CONFIG_KALLSYMS=y
> >> +CONFIG_KALLSYMS_ALL=y
> >>  CONFIG_HOTPLUG=y
> >>  CONFIG_PRINTK=y
> >> @@ -4367,15 +4367,19 @@
> >> +CONFIG_DEBUG_RT_MUTEXES=y
> >> +CONFIG_DEBUG_PI_LIST=y
> >> +CONFIG_DEBUG_SPINLOCK=y
> >> +CONFIG_DEBUG_MUTEXES=y
> >> +CONFIG_DEBUG_LOCK_ALLOC=y
> >> +CONFIG_PROVE_LOCKING=y
> >> +CONFIG_LOCKDEP=y
> >> +CONFIG_LOCK_STAT=y
> >> +CONFIG_TRACE_IRQFLAGS=y
> >> +CONFIG_DEBUG_SPINLOCK_SLEEP=y
> >> +CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
> >>  CONFIG_STACKTRACE=y
> >>  CONFIG_DEBUG_BUGVERBOSE=y
> >> @@ -4384,15 +4388,15 @@
> >>  CONFIG_DEBUG_MEMORY_INIT=y
> >> +CONFIG_DEBUG_LIST=y
> >> +CONFIG_DEBUG_NOTIFIERS=y
> >>  CONFIG_ARCH_WANT_FRAME_POINTERS=y
> >> +CONFIG_FRAME_POINTER=y
> >> +CONFIG_RCU_CPU_STALL_DETECTOR=y
> >> @@ -4448,7 +4452,7 @@
> >>  CONFIG_X86_VERBOSE_BOOTUP=y
> >>  CONFIG_EARLY_PRINTK=y
> >> +CONFIG_DEBUG_STACKOVERFLOW=y
> >>
> >> 2) I then booted the kernel and used "xm sysrq lindi1 t" to get a
> >> backtrace from all threads but forgot to run "xm console lindi1". (The
> >> bug does not occur if you are connected to the console!).
> >>
> >> Expected results:
> >> 2) domU does not crash
> >>
> >> Actual results:
> >> 2) domU prints a lot of backtraces and then panics.
> >>
> >> More info:
> >> 1) I was able to capture the panic message by running
> >>
> >> sudo gdbserver-xen 127.0.0.1:9999 --attach 4
> >> sudo gdb /local/lindi/vmlinux-2.6.32-5-amd64
> >> dump memory dump.txt __log_buf (__log_buf + 4096*100)
> >>
> >> on dom0:
> >>
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 00000000ffffffff     0  1440      1 0x00000080
> >> <4>[   71.816059]  ffff88007d483c68 0000000000000246 ffff88007d483c38 ffff88007d483c34
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d483fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007e554ec0 ffff88007ff52760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000031     0  1441      1 0x00000080
> >> <4>[   71.816059]  ffff88007d485c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d485fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007e552760 ffff88007ddf3b10
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1442      1 0x00000080
> >> <4>[   71.816059]  ffff88007d487c68 0000000000000246 0000000000000000 ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d487fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007e556270 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000033     0  1443      1 0x00000080
> >> <4>[   71.816059]  ffff88007d491c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d491fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d488000 ffff88007d4893b0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000034     0  1444      1 0x00000080
> >> <4>[   71.816059]  ffff88007d493c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d493fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4893b0 ffff88007d4a6270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000035     0  1445      1 0x00000080
> >> <4>[   71.816059]  ffff88007d495c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d495fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d48a760 ffff88007d4a6270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000036     0  1446      1 0x00000080
> >> <4>[   71.816059]  ffff88007d499c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d499fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d48bb10 ffff88007db493b0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000037     0  1447      1 0x00000080
> >> <4>[   71.816059]  ffff88007d49bc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d49bfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d48cec0 ffff88007d48e270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000038     0  1448      1 0x00000080
> >> <4>[   71.816059]  ffff88007d49dc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d49dfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d48e270 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000039     0  1449      1 0x00000080
> >> <4>[   71.816059]  ffff88007d49fc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d49ffd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a0000 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000003a     0  1450      1 0x00000080
> >> <4>[   71.816059]  ffff88007d4a9c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d4a9fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a13b0 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1451      1 0x00000080
> >> <4>[   71.816059]  ffff88007d4abc68 0000000000000246 0000000000000000 ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d4abfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a2760 ffff88007ff52760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000003c     0  1452      1 0x00000080
> >> <4>[   71.816059]  ffff88007d4adc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d4adfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a3b10 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000003d     0  1453      1 0x00000080
> >> <4>[   71.816059]  ffff88007d4afc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d4affd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a4ec0 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000003e     0  1454      1 0x00000080
> >> <4>[   71.816059]  ffff88007d4b9c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007d4b9fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4a6270 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1461      1 0x00000080
> >> <4>[   71.816059]  ffff88007ebb9cc8 0000000000000246 0000000000000000 0000000000000000
> >> <4>[   71.816059]  0000000000000293 00000000000002b7 000000000000fa40 ffff88007ebb9fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db7bb10 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff81339494>] ? __mutex_unlock_slowpath+0x132/0x13b
> >> <4>[   71.816059]  [<ffffffff8110a7c3>] pipe_wait+0x5d/0x79
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81339a3b>] ? mutex_lock_nested+0x37/0x3c
> >> <4>[   71.816059]  [<ffffffff8110b039>] pipe_read+0x361/0x3dc
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff81103685>] do_sync_read+0xe7/0x12d
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8116dba3>] ? security_file_permission+0x11/0x13
> >> <4>[   71.816059]  [<ffffffff8110411d>] vfs_read+0xa8/0x102
> >> <4>[   71.816059]  [<ffffffff8110423b>] sys_read+0x47/0x70
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] exim4         S 0000000000000000     0  1462      1 0x00000080
> >> <4>[   71.816059]  ffff88007da7f918 0000000000000246 0000000000000000 0000000000000246
> >> <4>[   71.816059]  00000000000002d2 ffffffff81afd7e0 000000000000fa40 ffff88007da7ffd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d33a760 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff81339a8e>] schedule_hrtimeout_range+0x4e/0x11a
> >> <4>[   71.816059]  [<ffffffff8106a41c>] ? add_wait_queue+0x3c/0x45
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8111285b>] ? __pollwait+0xc6/0xcf
> >> <4>[   71.816059]  [<ffffffff811115d9>] poll_schedule_timeout+0x39/0x59
> >> <4>[   71.816059]  [<ffffffff8111229e>] do_select+0x5c1/0x605
> >> <4>[   71.816059]  [<ffffffff81111cdd>] ? do_select+0x0/0x605
> >> <4>[   71.816059]  [<ffffffff810796fa>] ? register_lock_class+0x20/0x351
> >> <4>[   71.816059]  [<ffffffff81112795>] ? __pollwait+0x0/0xcf
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8111249b>] core_sys_select+0x1b9/0x255
> >> <4>[   71.816059]  [<ffffffff81112323>] ? core_sys_select+0x41/0x255
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8133a94c>] ? _spin_unlock_irq+0x2b/0x36
> >> <4>[   71.816059]  [<ffffffff8107a98c>] ? trace_hardirqs_on_caller+0x110/0x134
> >> <4>[   71.816059]  [<ffffffff8107a9bd>] ? trace_hardirqs_on+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8133a953>] ? _spin_unlock_irq+0x32/0x36
> >> <4>[   71.816059]  [<ffffffff8111276d>] sys_select+0x94/0xbc
> >> <4>[   71.816059]  [<ffffffff810a1697>] ? audit_syscall_entry+0x114/0x140
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] getty         S 0000000000000000     0  1490      1 0x00000080
> >> <4>[   71.816059]  ffff88007da5dd08 0000000000000246 0000000000000000 0000000000000019
> >> <4>[   71.816059]  ffff88007da5dc88 ffffffff8107a4b3 000000000000fa40 ffff88007da5dfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db7e270 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff81339060>] schedule_timeout+0x31/0xef
> >> <4>[   71.816059]  [<ffffffff8105e704>] ? del_timer_sync+0x8e/0x9e
> >> <4>[   71.816059]  [<ffffffff8105e676>] ? del_timer_sync+0x0/0x9e
> >> <4>[   71.816059]  [<ffffffff810670c4>] ? flush_delayed_work+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff8122c57c>] n_tty_read+0x50b/0x7e1
> >> <4>[   71.816059]  [<ffffffff8104cf3f>] ? default_wake_function+0x0/0xf
> >> <4>[   71.816059]  [<ffffffff81227fa1>] tty_read+0x7d/0xba
> >> <4>[   71.816059]  [<ffffffff8110411d>] vfs_read+0xa8/0x102
> >> <4>[   71.816059]  [<ffffffff8110423b>] sys_read+0x47/0x70
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] sshd          S 0000000000000000     0  1491   1211 0x00000080
> >> <4>[   71.816059]  ffff88007d2fd918 0000000000000246 ffff8800079c0640 ffff8800079c0640
> >> <4>[   71.816059]  ffff88007d2fd938 ffffffff81066ee2 000000000000fa40 ffff88007d2fdfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db7cec0 ffff88007d4c2760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff81066ee2>] ? flush_work+0xcd/0xf2
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff8105e668>] ? try_to_del_timer_sync+0x66/0x74
> >> <4>[   71.816059]  [<ffffffff81339a8e>] schedule_hrtimeout_range+0x4e/0x11a
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8122efb1>] ? put_ldisc+0xb8/0xbd
> >> <4>[   71.816059]  [<ffffffff811115d9>] poll_schedule_timeout+0x39/0x59
> >> <4>[   71.816059]  [<ffffffff8111229e>] do_select+0x5c1/0x605
> >> <4>[   71.816059]  [<ffffffff81111cdd>] ? do_select+0x0/0x605
> >> <4>[   71.816059]  [<ffffffff81112795>] ? __pollwait+0x0/0xcf
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8111249b>] core_sys_select+0x1b9/0x255
> >> <4>[   71.816059]  [<ffffffff81112323>] ? core_sys_select+0x41/0x255
> >> <4>[   71.816059]  [<ffffffff81103558>] ? do_sync_write+0xe7/0x12d
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff8111276d>] sys_select+0x94/0xbc
> >> <4>[   71.816059]  [<ffffffff810a1697>] ? audit_syscall_entry+0x114/0x140
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] bash          S 0000000000000000     0  1492   1491 0x00000080
> >> <4>[   71.816059]  ffff88007d6d7e68 0000000000000246 0000000000000000 00000000000001f0
> >> <4>[   71.816059]  ffffffff8100de75 ffff88007d6d7e48 000000000000fa40 ffff88007d6d7fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dde2760 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81053ef5>] do_wait+0x1b9/0x227
> >> <4>[   71.816059]  [<ffffffff81054009>] sys_wait4+0xa6/0xc3
> >> <4>[   71.816059]  [<ffffffff81052711>] ? child_wait_callback+0x0/0x53
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] screen        S 0000000000000000     0  1508   1492 0x00000080
> >> <4>[   71.816059]  ffff88007ebd1f68 0000000000000246 0000000000000000 ffffffff8107a98c
> >> <4>[   71.816059]  ffff88007ddfd6c8 ffff88007ebd1f48 000000000000fa40 ffff88007ebd1fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007e526270 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8107a98c>] ? trace_hardirqs_on_caller+0x110/0x134
> >> <4>[   71.816059]  [<ffffffff810a1697>] ? audit_syscall_entry+0x114/0x140
> >> <4>[   71.816059]  [<ffffffff8105f565>] sys_pause+0x19/0x22
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] screen        S 0000000000000000     0  1509   1508 0x00000080
> >> <4>[   71.816059]  ffff88007d80b918 0000000000000246 0000000000000000 ffff8800079c0640
> >> <4>[   71.816059]  ffff88007d80b938 ffffffff81066ee2 000000000000fa40 ffff88007d80bfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dde0000 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff81066ee2>] ? flush_work+0xcd/0xf2
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8105e668>] ? try_to_del_timer_sync+0x66/0x74
> >> <4>[   71.816059]  [<ffffffff81339a8e>] schedule_hrtimeout_range+0x4e/0x11a
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8122efb1>] ? put_ldisc+0xb8/0xbd
> >> <4>[   71.816059]  [<ffffffff811115d9>] poll_schedule_timeout+0x39/0x59
> >> <4>[   71.816059]  [<ffffffff8111229e>] do_select+0x5c1/0x605
> >> <4>[   71.816059]  [<ffffffff81111cdd>] ? do_select+0x0/0x605
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff81112795>] ? __pollwait+0x0/0xcf
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8111249b>] core_sys_select+0x1b9/0x255
> >> <4>[   71.816059]  [<ffffffff81112323>] ? core_sys_select+0x41/0x255
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8122efb1>] ? put_ldisc+0xb8/0xbd
> >> <4>[   71.816059]  [<ffffffff8111276d>] sys_select+0x94/0xbc
> >> <4>[   71.816059]  [<ffffffff810a1697>] ? audit_syscall_entry+0x114/0x140
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] bash          S 0000000000000000     0  1510   1509 0x00000080
> >> <4>[   71.816059]  ffff88007da75e68 0000000000000246 0000000000000000 00000000000001f0
> >> <4>[   71.816059]  ffffffff8100de75 ffff88007da75e48 000000000000fa40 ffff88007da75fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d4c4ec0 ffffffff8151be20
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81053ef5>] do_wait+0x1b9/0x227
> >> <4>[   71.816059]  [<ffffffff81054009>] sys_wait4+0xa6/0xc3
> >> <4>[   71.816059]  [<ffffffff81052711>] ? child_wait_callback+0x0/0x53
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] sudo          S 0000000000000000     0  1531   1510 0x00000080
> >> <4>[   71.816059]  ffff88007d62f918 0000000000000246 0000000000000000 ffff88007d379900
> >> <4>[   71.816059]  0000000000000246 00000010739b297e 000000000000fa40 ffff88007d62ffd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db7a760 ffff88007ff53b10
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8111285b>] ? __pollwait+0xc6/0xcf
> >> <4>[   71.816059]  [<ffffffff812eb9ba>] ? unix_peer_get+0x19/0x3d
> >> <4>[   71.816059]  [<ffffffff81339a8e>] schedule_hrtimeout_range+0x4e/0x11a
> >> <4>[   71.816059]  [<ffffffff8133a9d2>] ? _spin_unlock+0x26/0x2a
> >> <4>[   71.816059]  [<ffffffff812eb9d6>] ? unix_peer_get+0x35/0x3d
> >> <4>[   71.816059]  [<ffffffff811115d9>] poll_schedule_timeout+0x39/0x59
> >> <4>[   71.816059]  [<ffffffff8111229e>] do_select+0x5c1/0x605
> >> <4>[   71.816059]  [<ffffffff81111cdd>] ? do_select+0x0/0x605
> >> <4>[   71.816059]  [<ffffffff81112795>] ? __pollwait+0x0/0xcf
> >> <4>[   71.816059]  [<ffffffff81112864>] ? pollwake+0x0/0x5c
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8111249b>] core_sys_select+0x1b9/0x255
> >> <4>[   71.816059]  [<ffffffff81112323>] ? core_sys_select+0x41/0x255
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff8111276d>] sys_select+0x94/0xbc
> >> <4>[   71.816059]  [<ffffffff810a1697>] ? audit_syscall_entry+0x114/0x140
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] sh            R  running task        0  1532   1531 0x00000088
> >> <4>[   71.816059]  ffff88007e56b838 ffff880007b9c580 ffff880007b9c590 0000000000000000
> >> <4>[   71.816059]  0000000000000005 0000000affffffff ffff88007e56b868 ffffffff811b2c0d
> >> <4>[   71.816059]  ffff88007e56b918 ffffffff811b2de7 3178302b68746100 000062310000000a
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff811b2c0d>] ? put_dec+0x24/0xca
> >> <4>[   71.816059]  [<ffffffff811b2de7>] ? number+0x134/0x246
> >> <4>[   71.816059]  [<ffffffff8133d7e1>] ? __atomic_notifier_call_chain+0x78/0x87
> >> <4>[   71.816059]  [<ffffffff8133a9d2>] ? _spin_unlock+0x26/0x2a
> >> <4>[   71.816059]  [<ffffffff81237e24>] ? vt_console_print+0x28f/0x29e
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff81051a26>] ? vprintk+0x396/0x3d8
> >> <4>[   71.816059]  [<ffffffff81237e24>] ? vt_console_print+0x28f/0x29e
> >> <4>[   71.816059]  [<ffffffff81237bd8>] ? vt_console_print+0x43/0x29e
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff81338252>] ? printk+0x67/0x6d
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff81051a26>] ? vprintk+0x396/0x3d8
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81085361>] ? __module_text_address+0xd/0x5b
> >> <4>[   71.816059]  [<ffffffff810853b8>] ? is_module_text_address+0x9/0x11
> >> <4>[   71.816059]  [<ffffffff81068128>] ? __kernel_text_address+0x65/0x6b
> >> <4>[   71.816059]  [<ffffffff81068128>] ? __kernel_text_address+0x65/0x6b
> >> <4>[   71.816059]  [<ffffffff81014828>] ? print_context_stack+0xa2/0xba
> >> <4>[   71.816059]  [<ffffffff81013d3f>] ? dump_trace+0x260/0x271
> >> <4>[   71.816059]  [<ffffffff810146df>] show_trace_log_lvl+0x4c/0x58
> >> <4>[   71.816059]  [<ffffffff810138c7>] show_stack_log_lvl+0xff/0x10e
> >> <4>[   71.816059]  [<ffffffff81014691>] show_stack+0x17/0x19
> >> <4>[   71.816059]  [<ffffffff8104a227>] sched_show_task+0xae/0xb3
> >> <4>[   71.816059]  [<ffffffff8104a27c>] show_state_filter+0x50/0xa9
> >> <4>[   71.816059]  [<ffffffff8123d658>] sysrq_handle_showstate+0xb/0xd
> >> <4>[   71.816059]  [<ffffffff8123d52f>] __handle_sysrq+0xbb/0x158
> >> <4>[   71.816059]  [<ffffffff8123d5cc>] ? write_sysrq_trigger+0x0/0x44
> >> <4>[   71.816059]  [<ffffffff8123d605>] write_sysrq_trigger+0x39/0x44
> >> <4>[   71.816059]  [<ffffffff81149aad>] proc_reg_write+0x84/0xa1
> >> <4>[   71.816059]  [<ffffffff81103f2f>] vfs_write+0xab/0x105
> >> <4>[   71.816059]  [<ffffffff8110404d>] sys_write+0x47/0x6f
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <4>[   71.816059] Sched Debug Version: v0.09, 2.6.32-5+lindi.1-amd64 #1
> >> <4>[   71.816059] now at 85287.968302 msecs
> >> <4>[   71.816059]   .jiffies                                 : 4294912466
> >> <4>[   71.816059]   .sysctl_sched_latency                    : 15.000000
> >> <4>[   71.816059]   .sysctl_sched_min_granularity            : 3.000000
> >> <4>[   71.816059]   .sysctl_sched_wakeup_granularity         : 3.000000
> >> <4>[   71.816059]   .sysctl_sched_child_runs_first           : 0.000000
> >> <4>[   71.816059]   .sysctl_sched_features                   : 15834235
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cpu#0, 2394.000 MHz
> >> <4>[   71.816059]   .nr_running                    : 1
> >> <4>[   71.816059]   .load                          : 1024
> >> <4>[   71.816059]   .nr_switches                   : 11454
> >> <4>[   71.816059]   .nr_load_updates               : 5618
> >> <4>[   71.816059]   .nr_uninterruptible            : 1
> >> <4>[   71.816059]   .next_balance                  : 4294.910575
> >> <4>[   71.816059]   .curr->pid                     : 1046
> >> <4>[   71.816059]   .clock                         : 75789.077421
> >> <4>[   71.816059]   .cpu_load[0]                   : 0
> >> <4>[   71.816059]   .cpu_load[1]                   : 0
> >> <4>[   71.816059]   .cpu_load[2]                   : 0
> >> <4>[   71.816059]   .cpu_load[3]                   : 0
> >> <4>[   71.816059]   .cpu_load[4]                   : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cfs_rq[0]:/
> >> <4>[   71.816059]   .exec_clock                    : 0.000000
> >> <4>[   71.816059]   .MIN_vruntime                  : 0.000001
> >> <4>[   71.816059]   .min_vruntime                  : 9426.044216
> >> <4>[   71.816059]   .max_vruntime                  : 0.000001
> >> <4>[   71.816059]   .spread                        : 0.000000
> >> <4>[   71.816059]   .spread0                       : 0.000000
> >> <4>[   71.816059]   .nr_running                    : 1
> >> <4>[   71.816059]   .load                          : 1024
> >> <4>[   71.816059]   .nr_spread_over                : 0
> >> <4>[   71.816059]   .shares                        : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] rt_rq[0]:
> >> <4>[   71.816059]   .rt_nr_running                 : 0
> >> <4>[   71.816059]   .rt_throttled                  : 0
> >> <4>[   71.816059]   .rt_time                       : 0.000000
> >> <4>[   71.816059]   .rt_runtime                    : 950.000000
> >> <4>[   71.816059] 
> >> <4>[   71.816059] runnable tasks:
> >> <4>[   71.816059]             task   PID         tree-key  switches  prio     exec-runtime         sum-exec        sum-sleep
> >> <4>[   71.816059] ----------------------------------------------------------------------------------------------------------
> >> <4>[   71.816059] R           nsca  1046      9426.044216        51   120               0               0               0.000000               0.000000               0.000000 /
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cpu#1, 2394.000 MHz
> >> <4>[   71.816059]   .nr_running                    : 1
> >> <4>[   71.816059]   .load                          : 1024
> >> <4>[   71.816059]   .nr_switches                   : 8912
> >> <4>[   71.816059]   .nr_load_updates               : 5067
> >> <4>[   71.816059]   .nr_uninterruptible            : 17
> >> <4>[   71.816059]   .next_balance                  : 4294.910025
> >> <4>[   71.816059]   .curr->pid                     : 1532
> >> <4>[   71.816059]   .clock                         : 71816.059281
> >> <4>[   71.816059]   .cpu_load[0]                   : 1024
> >> <4>[   71.816059]   .cpu_load[1]                   : 512
> >> <4>[   71.816059]   .cpu_load[2]                   : 256
> >> <4>[   71.816059]   .cpu_load[3]                   : 128
> >> <4>[   71.816059]   .cpu_load[4]                   : 64
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cfs_rq[1]:/
> >> <4>[   71.816059]   .exec_clock                    : 0.000000
> >> <4>[   71.816059]   .MIN_vruntime                  : 0.000001
> >> <4>[   71.816059]   .min_vruntime                  : 12008.498567
> >> <4>[   71.816059]   .max_vruntime                  : 0.000001
> >> <4>[   71.816059]   .spread                        : 0.000000
> >> <4>[   71.816059]   .spread0                       : 2582.454351
> >> <4>[   71.816059]   .nr_running                    : 1
> >> <4>[   71.816059]   .load                          : 1024
> >> <4>[   71.816059]   .nr_spread_over                : 0
> >> <4>[   71.816059]   .shares                        : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] rt_rq[1]:
> >> <4>[   71.816059]   .rt_nr_running                 : 0
> >> <4>[   71.816059]   .rt_throttled                  : 0
> >> <4>[   71.816059]   .rt_time                       : 0.000000
> >> <4>[   71.816059]   .rt_runtime                    : 950.000000
> >> <4>[   71.816059] 
> >> <4>[   71.816059] runnable tasks:
> >> <4>[   71.816059]             task   PID         tree-key  switches  prio     exec-runtime         sum-exec        sum-sleep
> >> <4>[   71.816059] ----------------------------------------------------------------------------------------------------------
> >> <4>[   71.816059] R             sh  1532     12008.498567         3   120               0               0               0.000000               0.000000               0.000000 /
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cpu#2, 2394.000 MHz
> >> <4>[   71.816059]   .nr_running                    : 0
> >> <4>[   71.816059]   .load                          : 0
> >> <4>[   71.816059]   .nr_switches                   : 5200
> >> <4>[   71.816059]   .nr_load_updates               : 6701
> >> <4>[   71.816059]   .nr_uninterruptible            : -8
> >> <4>[   71.816059]   .next_balance                  : 4294.912466
> >> <4>[   71.816059]   .curr->pid                     : 0
> >> <4>[   71.816059]   .clock                         : 80673.012224
> >> <4>[   71.816059]   .cpu_load[0]                   : 0
> >> <4>[   71.816059]   .cpu_load[1]                   : 0
> >> <4>[   71.816059]   .cpu_load[2]                   : 0
> >> <4>[   71.816059]   .cpu_load[3]                   : 0
> >> <4>[   71.816059]   .cpu_load[4]                   : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cfs_rq[2]:/
> >> <4>[   71.816059]   .exec_clock                    : 0.000000
> >> <4>[   71.816059]   .MIN_vruntime                  : 0.000001
> >> <4>[   71.816059]   .min_vruntime                  : 7154.290231
> >> <4>[   71.816059]   .max_vruntime                  : 0.000001
> >> <4>[   71.816059]   .spread                        : 0.000000
> >> <4>[   71.816059]   .spread0                       : -2271.753985
> >> <4>[   71.816059]   .nr_running                    : 0
> >> <4>[   71.816059]   .load                          : 0
> >> <4>[   71.816059]   .nr_spread_over                : 0
> >> <4>[   71.816059]   .shares                        : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] rt_rq[2]:
> >> <4>[   71.816059]   .rt_nr_running                 : 0
> >> <4>[   71.816059]   .rt_throttled                  : 0
> >> <4>[   71.816059]   .rt_time                       : 0.000000
> >> <4>[   71.816059]   .rt_runtime                    : 950.000000
> >> <4>[   71.816059] 
> >> <4>[   71.816059] runnable tasks:
> >> <4>[   71.816059]             task   PID         tree-key  switches  prio     exec-runtime         sum-exec        sum-sleep
> >> <4>[   71.816059] ----------------------------------------------------------------------------------------------------------
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cpu#3, 2394.000 MHz
> >> <4>[   71.816059]   .nr_running                    : 0
> >> <4>[   71.816059]   .load                          : 0
> >> <4>[   71.816059]   .nr_switches                   : 4398
> >> <4>[   71.816059]   .nr_load_updates               : 6055
> >> <4>[   71.816059]   .nr_uninterruptible            : -9
> >> <4>[   71.816059]   .next_balance                  : 4294.912466
> >> <4>[   71.816059]   .curr->pid                     : 0
> >> <4>[   71.816059]   .clock                         : 80673.512781
> >> <4>[   71.816059]   .cpu_load[0]                   : 0
> >> <4>[   71.816059]   .cpu_load[1]                   : 0
> >> <4>[   71.816059]   .cpu_load[2]                   : 0
> >> <4>[   71.816059]   .cpu_load[3]                   : 0
> >> <4>[   71.816059]   .cpu_load[4]                   : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] cfs_rq[3]:/
> >> <4>[   71.816059]   .exec_clock                    : 0.000000
> >> <4>[   71.816059]   .MIN_vruntime                  : 0.000001
> >> <4>[   71.816059]   .min_vruntime                  : 5646.686691
> >> <4>[   71.816059]   .max_vruntime                  : 0.000001
> >> <4>[   71.816059]   .spread                        : 0.000000
> >> <4>[   71.816059]   .spread0                       : -3779.357525
> >> <4>[   71.816059]   .nr_running                    : 0
> >> <4>[   71.816059]   .load                          : 0
> >> <4>[   71.816059]   .nr_spread_over                : 0
> >> <4>[   71.816059]   .shares                        : 0
> >> <4>[   71.816059] 
> >> <4>[   71.816059] rt_rq[3]:
> >> <4>[   71.816059]   .rt_nr_running                 : 0
> >> <4>[   71.816059]   .rt_throttled                  : 0
> >> <4>[   71.816059]   .rt_time                       : 0.000000
> >> <4>[   71.816059]   .rt_runtime                    : 950.000000
> >> <4>[   71.816059] 
> >> <4>[   71.816059] runnable tasks:
> >> <4>[   71.816059]             task   PID         tree-key  switches  prio     exec-runtime         sum-exec        sum-sleep
> >> <4>[   71.816059] ----------------------------------------------------------------------------------------------------------
> >> <4>[   71.816059] 
> >>
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000004     0  1396      1 0x00000080
> >> <4>[   71.816059]  ffff88007ddcfc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007ddcffd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff880003560000 ffff88007dad4ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000005     0  1397      1 0x00000080
> >> <4>[   71.816059]  ffff88007e387c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007e387fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d0d0000 ffff8800034ca760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 00000000ffffffff     0  1398      1 0x00000080
> >> <4>[   71.816059]  ffff88007e50dc68 0000000000000246 ffff88007e50dc38 ffff88007e50dc34
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007e50dfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d0d13b0 ffff88007ff52760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000007     0  1399      1 0x00000080
> >> <4>[   71.816059]  ffff88007ddd1c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007ddd1fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dad4ec0 ffff88007d0d0000
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000008     0  1400      1 0x00000080
> >> <4>[   71.816059]  ffff88007ebb1c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007ebb1fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dad0000 ffff88007db24ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000009     0  1401      1 0x00000080
> >> <4>[   71.816059]  ffff88007dd8bc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007dd8bfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dad6270 ffff88007db293b0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000001     0  1402      1 0x00000088
> >> <4>[   71.816059]  ffff88007db05c68 0000000000000246 ffff88007db05c38 ffff88007db05c34
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007db05fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007e5213b0 ffff880003566270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000000b     0  1403      1 0x00000080
> >> <4>[   71.816059]  ffff88007e533c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007e533fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d04e270 ffff8800034ca760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000000c     0  1404      1 0x00000080
> >> <4>[   71.816059]  ffff88007ebddc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  00000000000003da 0000000000000000 000000000000fa40 ffff88007ebddfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007d224ec0 ffff880003566270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8107a9bd>] ? trace_hardirqs_on+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 00000000ffffffff     0  1405      1 0x00000080
> >> <4>[   71.816059]  ffff88007dbcdc68 0000000000000246 ffff88007dbcdc38 ffff88007dbcdc34
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007dbcdfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff8800034ca760 ffff88007ff54ec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1406      1 0x00000080
> >> <4>[   71.816059]  ffff88007da1bc68 0000000000000246 0000000000000000 ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007da1bfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007dac13b0 ffff88007ff53b10
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 000000000000000f     0  1407      1 0x00000080
> >> <4>[   71.816059]  ffff88007db15c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007db15fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db20000 ffff8800035613b0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1408      1 0x00000080
> >> <4>[   71.816059]  ffff88007daf5c68 0000000000000246 0000000000000000 ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007daf5fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db213b0 ffff88007ff52760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000011     0  1409      1 0x00000080
> >> <4>[   71.816059]  ffff88007e59dc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007e59dfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db22760 ffff88007e5513b0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000012     0  1410      1 0x00000080
> >> <4>[   71.816059]  ffff88007e501c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007e501fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db23b10 ffff88007db2cec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000001     0  1411      1 0x00000080
> >> <4>[   71.816059]  ffff88007da43c68 0000000000000246 ffff88007da43c38 ffff88007da43c34
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007da43fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db24ec0 ffff88007db4cec0
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000000     0  1412      1 0x00000080
> >> <4>[   71.816059]  ffff88007dd29c68 0000000000000246 0000000000000000 ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007dd29fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db26270 ffff88007ff52760
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000015     0  1413      1 0x00000080
> >> <4>[   71.816059]  ffff88007ebf7c68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007ebf7fd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db28000 ffff88007db33b10
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000016     0  1414      1 0x00000080
> >> <4>[   71.816059]  ffff88007ddddc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40 ffff88007ddddfd8
> >> <4>[   71.816059]  00000000001d5bc0 00000000001d5bc0 ffff88007db293b0 ffff88007db2e270
> >> <4>[   71.816059] Call Trace:
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8133a9a7>] ? _spin_unlock_irqrestore+0x50/0x55
> >> <4>[   71.816059]  [<ffffffff812315c6>] vt_event_wait+0xc2/0x105
> >> <4>[   71.816059]  [<ffffffff8106a190>] ? autoremove_wake_function+0x0/0x38
> >> <4>[   71.816059]  [<ffffffff81231635>] vt_waitactive+0x2c/0x49
> >> <4>[   71.816059]  [<ffffffff81232b09>] vt_ioctl+0x125d/0x19c9
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   71.816059]  [<ffffffff8107a4b3>] ? mark_lock+0x22/0x22d
> >> <4>[   71.816059]  [<ffffffff8102e140>] ? pvclock_clocksource_read+0x42/0x9c
> >> <4>[   71.816059]  [<ffffffff8122a179>] tty_ioctl+0x7f4/0x85c
> >> <4>[   71.816059]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   71.816059]  [<ffffffff81110444>] vfs_ioctl+0x2a/0x78
> >> <4>[   71.816059]  [<ffffffff811109b7>] do_vfs_ioctl+0x4aa/0x4e7
> >> <4>[   71.816059]  [<ffffffff8100e4df>] ? xen_restore_fl_direct_end+0x0/0x1
> >> <4>[   71.816059]  [<ffffffff8107d438>] ? lock_release+0x199/0x1a6
> >> <4>[   71.816059]  [<ffffffff81110a49>] sys_ioctl+0x55/0x77
> >> <4>[   71.816059]  [<ffffffff81010c82>] system_call_fastpath+0x16/0x1b
> >> <6>[   71.816059] console-kit-d S 0000000000000017     0  1415      1 0x00000080
> >> <4>[   71.816059]  ffff88007dddfc68 0000000000000246 00000000000003da ffffffff81b1d760
> >> <4>[   71.816059]  0000000000000246 00000000000003da 000000000000fa40
> >> <3>[   80.677020] INFO: RCU detected CPU stalls: 1 (detected by 2, t=2502 jiffies)
> >> <6>[   80.677025] sending NMI to all CPUs:
> >> <1>[   80.677033] BUG: unable to handle kernel paging request at ffffffffff5fc310
> >> <1>[   80.677037] IP: [<ffffffff8102955c>] _flat_send_IPI_mask+0x53/0xa2
> >> <4>[   80.677043] PGD 1003067 PUD 1004067 PMD 182a067 PTE 0
> >> <0>[   80.677047] Oops: 0002 [#1] SMP 
> >> <0>[   80.677051] last sysfs file: /sys/devices/virtual/bdi/0:18/uevent
> >> <4>[   80.677054] CPU 2 
> >> <4>[   80.677056] Modules linked in: binfmt_misc nfs lockd fscache nfs_acl auth_rpcgss sunrpc bridge stp fuse loop evdev pcspkr ext3 jbd mbcache xen_netfront xen_blkfront
> >> <6>[   80.677072] Pid: 0, comm: swapper Not tainted 2.6.32-5+lindi.1-amd64 #1 
> >> <6>[   80.677074] RIP: e030:[<ffffffff8102955c>]  [<ffffffff8102955c>] _flat_send_IPI_mask+0x53/0xa2
> >> <6>[   80.677078] RSP: e02b:ffff880007ba7c18  EFLAGS: 00010006
> >> <6>[   80.677081] RAX: 000000000f000000 RBX: 0000000000000800 RCX: 000000003b0f3b01
> >> <6>[   80.677083] RDX: ffff88007ff53b10 RSI: 0000000000000002 RDI: ffffffff81029530
> >> <6>[   80.677086] RBP: ffff880007ba7c38 R08: 000000000000000f R09: ffffffff8133a996
> >> <6>[   80.677088] R10: 0000000000000000 R11: 0000000000018600 R12: 0000000000000002
> >> <6>[   80.677090] R13: ffffffff81590040 R14: 000000000000000f R15: ffffffff8152e7c0
> >> <6>[   80.677096] FS:  00007fcf3a896700(0000) GS:ffff880007ba4000(0000) knlGS:0000000000000000
> >> <6>[   80.677099] CS:  e033 DS: 002b ES: 002b CR0: 000000008005003b
> >> <6>[   80.677101] CR2: ffffffffff5fc310 CR3: 000000007d619000 CR4: 0000000000002660
> >> <6>[   80.677104] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> >> <6>[   80.677106] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> >> <4>[   80.677109] Process swapper (pid: 0, threadinfo ffff88007ff5e000, task ffff88007ff53b10)
> >> <0>[   80.677111] Stack:
> >> <4>[   80.677112]  0000000000000000 ffffffff8152e100 ffff880007d74400 0000000000000000
> >> <4>[   80.677116] <0> ffff880007ba7c48 ffffffff81029606 ffff880007ba7c68 ffffffff810263d0
> >> <4>[   80.677121] <0> 0000000000000002 ffffffff8152e7c0 ffff880007ba7ca8 ffffffff810a7f04
> >> <0>[   80.677125] Call Trace:
> >> <0>[   80.677127]  <IRQ> 
> >> <4>[   80.677131]  [<ffffffff81029606>] flat_send_IPI_all+0x1d/0x57
> >> <4>[   80.677134]  [<ffffffff810263d0>] arch_trigger_all_cpu_backtrace+0x40/0x6d
> >> <4>[   80.677138]  [<ffffffff810a7f04>] __rcu_pending+0x1d4/0x2ac
> >> <4>[   80.677141]  [<ffffffff810a800d>] rcu_check_callbacks+0x31/0x118
> >> <4>[   80.677145]  [<ffffffff8105e8ac>] update_process_times+0x3a/0x54
> >> <4>[   80.677149]  [<ffffffff810765cd>] tick_sched_timer+0x73/0x9d
> >> <4>[   80.677152]  [<ffffffff8107655a>] ? tick_sched_timer+0x0/0x9d
> >> <4>[   80.677155]  [<ffffffff8106ca8c>] __run_hrtimer+0xb9/0x116
> >> <4>[   80.677158]  [<ffffffff8106ccda>] hrtimer_interrupt+0xb5/0x19f
> >> <4>[   80.677162]  [<ffffffff8100e252>] xen_timer_interrupt+0x39/0x182
> >> <4>[   80.677165]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   80.677168]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   80.677172]  [<ffffffff810a56ce>] ? handle_level_irq+0x1d/0xd9
> >> <4>[   80.677176]  [<ffffffff810a3bf7>] handle_IRQ_event+0x54/0x133
> >> <4>[   80.677179]  [<ffffffff810a5729>] handle_level_irq+0x78/0xd9
> >> <4>[   80.677182]  [<ffffffff81013774>] handle_irq+0x89/0x91
> >> <4>[   80.677187]  [<ffffffff8121e5c6>] __xen_evtchn_do_upcall+0xd8/0x161
> >> <4>[   80.677190]  [<ffffffff8121e691>] xen_evtchn_do_upcall+0x2e/0x41
> >> <4>[   80.677193]  [<ffffffff81011f3e>] xen_do_hypervisor_callback+0x1e/0x30
> >> <0>[   80.677195]  <EOI> 
> >> <4>[   80.677199]  [<ffffffff8133d769>] ? __atomic_notifier_call_chain+0x0/0x87
> >> <4>[   80.677203]  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1006
> >> <4>[   80.677207]  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1006
> >> <4>[   80.677210]  [<ffffffff8100df0c>] ? xen_safe_halt+0x10/0x1a
> >> <4>[   80.677214]  [<ffffffff8100bf9a>] ? xen_idle+0x4a/0x54
> >> <4>[   80.677217]  [<ffffffff8100ff9e>] ? cpu_idle+0xa9/0xe1
> >> <4>[   80.677220]  [<ffffffff8100e499>] ? xen_irq_enable_direct_end+0x0/0x7
> >> <4>[   80.677224]  [<ffffffff8132e4d6>] ? cpu_bringup_and_idle+0xe/0x10
> >> <0>[   80.677226] Code: 8b 05 69 59 57 00 41 83 fc 02 8b 58 34 75 0a ff 90 58 01 00 00 eb 0e f3 90 8b 04 25 00 c3 5f ff f6 c4 10 75 f2 44 89 f0 c1 e0 18 <89> 04 25 10 c3 5f ff 44 89 e0 09 d8 80 cf 04 41 83 fc 02 0f 44 
> >> <1>[   80.677263] RIP  [<ffffffff8102955c>] _flat_send_IPI_mask+0x53/0xa2
> >> <4>[   80.677267]  RSP <ffff880007ba7c18>
> >> <0>[   80.677268] CR2: ffffffffff5fc310
> >> <4>[   80.677273] ---[ end trace ac037c75a997a05b ]---
> >> <0>[   80.677275] Kernel panic - not syncing: Fatal exception in interrupt
> >> <4>[   80.677278] Pid: 0, comm: swapper Tainted: G      D    2.6.32-5+lindi.1-amd64 #1
> >> <4>[   80.677280] Call Trace:
> >> <4>[   80.677282]  <IRQ>  [<ffffffff8102006b>] ? mce_init+0x9f/0xd0
> >> <4>[   80.677288]  [<ffffffff81338129>] panic+0xa0/0x162
> >> <4>[   80.677291]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   80.677295]  [<ffffffff8133a996>] ? _spin_unlock_irqrestore+0x3f/0x55
> >> <4>[   80.677298]  [<ffffffff8107924e>] ? trace_hardirqs_off+0xd/0xf
> >> <4>[   80.677302]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   80.677305]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   80.677308]  [<ffffffff8102006b>] ? mce_init+0x9f/0xd0
> >> <4>[   80.677311]  [<ffffffff8133c01d>] oops_end+0xb2/0xc2
> >> <4>[   80.677315]  [<ffffffff810339c5>] no_context+0x1ea/0x1f9
> >> <4>[   80.677318]  [<ffffffff8102006b>] ? mce_init+0x9f/0xd0
> >> <4>[   80.677321]  [<ffffffff81033b9b>] __bad_area_nosemaphore+0x1c7/0x1ed
> >> <4>[   80.677325]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   80.677328]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   80.677331]  [<ffffffff8133a996>] ? _spin_unlock_irqrestore+0x3f/0x55
> >> <4>[   80.677335]  [<ffffffff8100c375>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
> >> <4>[   80.677338]  [<ffffffff81033bcf>] bad_area_nosemaphore+0xe/0x10
> >> <4>[   80.677341]  [<ffffffff8133d587>] do_page_fault+0x1aa/0x2fa
> >> <4>[   80.677344]  [<ffffffff8133b3c5>] page_fault+0x25/0x30
> >> <4>[   80.677348]  [<ffffffff8133a996>] ? _spin_unlock_irqrestore+0x3f/0x55
> >> <4>[   80.677351]  [<ffffffff81029530>] ? _flat_send_IPI_mask+0x27/0xa2
> >> <4>[   80.677355]  [<ffffffff8102955c>] ? _flat_send_IPI_mask+0x53/0xa2
> >> <4>[   80.677358]  [<ffffffff81029546>] ? _flat_send_IPI_mask+0x3d/0xa2
> >> <4>[   80.677362]  [<ffffffff81029606>] flat_send_IPI_all+0x1d/0x57
> >> <4>[   80.677365]  [<ffffffff810263d0>] arch_trigger_all_cpu_backtrace+0x40/0x6d
> >> <4>[   80.677368]  [<ffffffff810a7f04>] __rcu_pending+0x1d4/0x2ac
> >> <4>[   80.677372]  [<ffffffff810a800d>] rcu_check_callbacks+0x31/0x118
> >> <4>[   80.677375]  [<ffffffff8105e8ac>] update_process_times+0x3a/0x54
> >> <4>[   80.677378]  [<ffffffff810765cd>] tick_sched_timer+0x73/0x9d
> >> <4>[   80.677382]  [<ffffffff8107655a>] ? tick_sched_timer+0x0/0x9d
> >> <4>[   80.677385]  [<ffffffff8106ca8c>] __run_hrtimer+0xb9/0x116
> >> <4>[   80.677388]  [<ffffffff8106ccda>] hrtimer_interrupt+0xb5/0x19f
> >> <4>[   80.677391]  [<ffffffff8100e252>] xen_timer_interrupt+0x39/0x182
> >> <4>[   80.677395]  [<ffffffff8100de75>] ? xen_force_evtchn_callback+0xd/0xf
> >> <4>[   80.677398]  [<ffffffff8100e4f2>] ? check_events+0x12/0x20
> >> <4>[   80.677401]  [<ffffffff810a56ce>] ? handle_level_irq+0x1d/0xd9
> >> <4>[   80.677405]  [<ffffffff810a3bf7>] handle_IRQ_event+0x54/0x133
> >> <4>[   80.677408]  [<ffffffff810a5729>] handle_level_irq+0x78/0xd9
> >> <4>[   80.677411]  [<ffffffff81013774>] handle_irq+0x89/0x91
> >> <4>[   80.677415]  [<ffffffff8121e5c6>] __xen_evtchn_do_upcall+0xd8/0x161
> >> <4>[   80.677418]  [<ffffffff8121e691>] xen_evtchn_do_upcall+0x2e/0x41
> >> <4>[   80.677421]  [<ffffffff81011f3e>] xen_do_hypervisor_callback+0x1e/0x30
> >> <4>[   80.677423]  <EOI>  [<ffffffff8133d769>] ? __atomic_notifier_call_chain+0x0/0x87
> >> <4>[   80.677430]  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1006
> >> <4>[   80.677433]  [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1006
> >> <4>[   80.677436]  [<ffffffff8100df0c>] ? xen_safe_halt+0x10/0x1a
> >> <4>[   80.677440]  [<ffffffff8100bf9a>] ? xen_idle+0x4a/0x54
> >> <4>[   80.677443]  [<ffffffff8100ff9e>] ? cpu_idle+0xa9/0xe1
> >> <4>[   80.677446]  [<ffffffff8100e499>] ? xen_irq_enable_direct_end+0x0/0x7
> >> <4>[   80.677450]  [<ffffffff8132e4d6>] ? cpu_bringup_and_idle+0xe/0x10
> >>
> >>
> >>
> 
> 
> 
> 

-- 
Ian Campbell

The only person who always got his work done by Friday was Robinson Crusoe.
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- Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request
  - From: Jeremy Fitzhardinge <jeremy@goop.org>
References:
- Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request
  - From: Timo Juhani Lindfors <timo.lindfors@iki.fi>
- Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request
  - From: Ian Campbell <ijc@hellion.org.uk>
- Bug#597828: linux-image-2.6.32-5-amd64: [xen] debug options + sysrq-t => sending NMI to all CPUs: BUG: unable to handle kernel paging request
  - From: Jeremy Fitzhardinge <jeremy@goop.org>
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