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
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?).
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
>>
>>
>>
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