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Bug#688513: linux-image-3.5-trunk-amd64: soft lockup (CPU#1 stuck for stuck for Xs!) on Intel(R) Pentium(R) D CPU 2.80GHz



Package: src:linux
Version: 3.5.2-1~experimental.1
Severity: grave
Justification: causes non-serious data loss

Dear Maintainer,
Since returning to NZ and reinstalling Debian unstable on my computer in March this year, I have had issues with 
my computer freezing about once per week. This seems to be due to both CPUs freezing, but not at the same time -- 
I get error messages about stuck CPUs prior to the computer becoming completely unusable. This is a data loss issue
for me because the only fix I can use to get the computer working again is a reset, which can mean that cached
data from recent work is not written to the hard drive. The issue had not previously impacted my desktop work too much, 
as long as any programs that I ran saved their state at reasonably frequent intervals or did not take more than a
day or so to run. I have since replaced the computer with another system at my work, but now use the sytem at home
as an experimental web server, where intermittent, difficult-to-repeat CPU freezes are a bit more of a problem for me.

This was a system that had been kept in storage for about a year while I was in Germany, so I thought it might 
have been a hardware problem, but I've always had the thought of a software bug in the back of my head (this is 
my first report of the issue). Prior to my trip to Germany, I had been running Debian unstable fine (within expected
limits) for about 5 years (although the installation was 32-bit rather than the current 64-bit version). I have tried 
to update the kernels in an attempt to fix this problem, to no avail. The current kernel is from experimental, 
because I am always hoping that the next version will fix the problem.

There does not seem to be any relationship between anything obvious and the CPU freezes. Considering it might be
a hardware issue, I gave the computer a good clean with no change in behaviour. A brief memcheck (one pass) seemed 
fine. It is possible that the issue ocurrs more frequently under high load, but that might just be because I'm more
likely to be around the computer when it's doing more things at once.

An example dump from syslog is shown below:

Sep 23 17:22:51 assimilis kernel: [ 5448.148015] BUG: soft lockup - CPU#1 stuck for 22s! [nullmailer-send:8240]
Sep 23 17:22:51 assimilis kernel: [ 5448.148021] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:22:51 assimilis kernel: [ 5448.148139] CPU 1 
Sep 23 17:22:51 assimilis kernel: [ 5448.148141] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:22:51 assimilis kernel: [ 5448.148236] 
Sep 23 17:22:51 assimilis kernel: [ 5448.148240] Pid: 8240, comm: nullmailer-send Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
Sep 23 17:22:51 assimilis kernel: [ 5448.148246] RIP: 0010:[<ffffffff8107a576>]  [<ffffffff8107a576>] do_raw_spin_lock+0x15/0x1b
Sep 23 17:22:51 assimilis kernel: [ 5448.148257] RSP: 0000:ffff88005ae11d30  EFLAGS: 00000202
Sep 23 17:22:51 assimilis kernel: [ 5448.148260] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
Sep 23 17:22:51 assimilis kernel: [ 5448.148263] RDX: 0000000000000000 RSI: 00007f7a6edf74a4 RDI: ffffea0000d6eae0
Sep 23 17:22:51 assimilis kernel: [ 5448.148265] RBP: ffff880054c1ed98 R08: 0000000000000000 R09: 0000000000000000
Sep 23 17:22:51 assimilis kernel: [ 5448.148268] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8162f310
Sep 23 17:22:51 assimilis kernel: [ 5448.148271] R13: 0000000000000000 R14: 00000000000200da R15: ffff880054ca8480
Sep 23 17:22:51 assimilis kernel: [ 5448.148275] FS:  00007f7a6e138720(0000) GS:ffff88005f480000(0000) knlGS:0000000000000000
Sep 23 17:22:51 assimilis kernel: [ 5448.148278] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 23 17:22:51 assimilis kernel: [ 5448.148281] CR2: 00007f7a6edf74a4 CR3: 00000000503a0000 CR4: 00000000000007e0
Sep 23 17:22:51 assimilis kernel: [ 5448.148284] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 23 17:22:51 assimilis kernel: [ 5448.148287] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Sep 23 17:22:51 assimilis kernel: [ 5448.148291] Process nullmailer-send (pid: 8240, threadinfo ffff88005ae10000, task ffff88003717e870)
Sep 23 17:22:51 assimilis kernel: [ 5448.148293] Stack:
Sep 23 17:22:51 assimilis kernel: [ 5448.148295]  ffffffff810d736c ffff88005ad18bf0 ffff88005b8fdb80 ffffea0000d6eae0
Sep 23 17:22:51 assimilis kernel: [ 5448.148302]  ffff88005b8fdb80 0000000000000028 00000000000000cc 00007f7a6d97e000
Sep 23 17:22:51 assimilis kernel: [ 5448.148308]  ffffea00014d00d8 ffff880050130d98 ffff880054c1ed98 ffff88003d67efb8
Sep 23 17:22:51 assimilis kernel: [ 5448.148315] Call Trace:
Sep 23 17:22:51 assimilis kernel: [ 5448.148322]  [<ffffffff810d736c>] ? do_wp_page+0x406/0x565
Sep 23 17:22:51 assimilis kernel: [ 5448.148328]  [<ffffffff810d8d65>] ? handle_pte_fault+0x75d/0x7b4
Sep 23 17:22:51 assimilis kernel: [ 5448.148334]  [<ffffffff81061f39>] ? set_next_entity+0x32/0x52
Sep 23 17:22:51 assimilis kernel: [ 5448.148339]  [<ffffffff810d5d7d>] ? pte_offset_kernel+0x16/0x35
Sep 23 17:22:51 assimilis kernel: [ 5448.148344]  [<ffffffff813637fc>] ? do_page_fault+0x312/0x337
Sep 23 17:22:51 assimilis kernel: [ 5448.148350]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:22:51 assimilis kernel: [ 5448.148355]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:22:51 assimilis kernel: [ 5448.148358] Code: 05 e8 4f 10 14 00 c3 f0 81 2f 00 00 10 00 74 05 e8 20 10 14 00 c3 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 d0 74 07 f3 90 <66> 8b 07 eb f4 c3 8b 17 31 c0 89 d1 c1 e9 10 66 39 ca 75 14 8d 
Sep 23 17:23:19 assimilis kernel: [ 5476.148012] BUG: soft lockup - CPU#1 stuck for 23s! [nullmailer-send:8240]
Sep 23 17:23:19 assimilis kernel: [ 5476.148015] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:23:19 assimilis kernel: [ 5476.148110] CPU 1 
Sep 23 17:23:19 assimilis kernel: [ 5476.148112] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:23:19 assimilis kernel: [ 5476.148205] 
Sep 23 17:23:19 assimilis kernel: [ 5476.148208] Pid: 8240, comm: nullmailer-send Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
Sep 23 17:23:19 assimilis kernel: [ 5476.148214] RIP: 0010:[<ffffffff8107a576>]  [<ffffffff8107a576>] do_raw_spin_lock+0x15/0x1b
Sep 23 17:23:19 assimilis kernel: [ 5476.148220] RSP: 0000:ffff88005ae11d30  EFLAGS: 00000202
Sep 23 17:23:19 assimilis kernel: [ 5476.148223] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
Sep 23 17:23:19 assimilis kernel: [ 5476.148226] RDX: 0000000000000000 RSI: 00007f7a6edf74a4 RDI: ffffea0000d6eae0
Sep 23 17:23:19 assimilis kernel: [ 5476.148229] RBP: ffff880054c1ed98 R08: 0000000000000000 R09: 0000000000000000
Sep 23 17:23:19 assimilis kernel: [ 5476.148231] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8162f310
Sep 23 17:23:19 assimilis kernel: [ 5476.148234] R13: 0000000000000000 R14: 00000000000200da R15: ffff880054ca8480
Sep 23 17:23:19 assimilis kernel: [ 5476.148238] FS:  00007f7a6e138720(0000) GS:ffff88005f480000(0000) knlGS:0000000000000000
Sep 23 17:23:19 assimilis kernel: [ 5476.148241] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 23 17:23:19 assimilis kernel: [ 5476.148244] CR2: 00007f7a6edf74a4 CR3: 00000000503a0000 CR4: 00000000000007e0
Sep 23 17:23:19 assimilis kernel: [ 5476.148247] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 23 17:23:19 assimilis kernel: [ 5476.148250] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Sep 23 17:23:19 assimilis kernel: [ 5476.148254] Process nullmailer-send (pid: 8240, threadinfo ffff88005ae10000, task ffff88003717e870)
Sep 23 17:23:19 assimilis kernel: [ 5476.148256] Stack:
Sep 23 17:23:19 assimilis kernel: [ 5476.148258]  ffffffff810d736c ffff88005ad18bf0 ffff88005b8fdb80 ffffea0000d6eae0
Sep 23 17:23:19 assimilis kernel: [ 5476.148264]  ffff88005b8fdb80 0000000000000028 00000000000000cc 00007f7a6d97e000
Sep 23 17:23:19 assimilis kernel: [ 5476.148270]  ffffea00014d00d8 ffff880050130d98 ffff880054c1ed98 ffff88003d67efb8
Sep 23 17:23:19 assimilis kernel: [ 5476.148276] Call Trace:
Sep 23 17:23:19 assimilis kernel: [ 5476.148283]  [<ffffffff810d736c>] ? do_wp_page+0x406/0x565
Sep 23 17:23:19 assimilis kernel: [ 5476.148289]  [<ffffffff810d8d65>] ? handle_pte_fault+0x75d/0x7b4
Sep 23 17:23:19 assimilis kernel: [ 5476.148294]  [<ffffffff81061f39>] ? set_next_entity+0x32/0x52
Sep 23 17:23:19 assimilis kernel: [ 5476.148299]  [<ffffffff810d5d7d>] ? pte_offset_kernel+0x16/0x35
Sep 23 17:23:19 assimilis kernel: [ 5476.148303]  [<ffffffff813637fc>] ? do_page_fault+0x312/0x337
Sep 23 17:23:19 assimilis kernel: [ 5476.148308]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:23:19 assimilis kernel: [ 5476.148313]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:23:19 assimilis kernel: [ 5476.148315] Code: 05 e8 4f 10 14 00 c3 f0 81 2f 00 00 10 00 74 05 e8 20 10 14 00 c3 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 d0 74 07 f3 90 <66> 8b 07 eb f4 c3 8b 17 31 c0 89 d1 c1 e9 10 66 39 ca 75 14 8d 
Sep 23 17:23:23 assimilis kernel: [ 5480.303997] INFO: rcu_sched self-detected stall on CPU { 1}  (t=15000 jiffies)
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] sending NMI to all CPUs:
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] NMI backtrace for cpu 1
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] CPU 1 
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] 
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Pid: 8240, comm: nullmailer-send Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] RIP: 0010:[<ffffffff810141c1>]  [<ffffffff810141c1>] native_read_tsc+0x2/0xf
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] RSP: 0000:ffff88005f483de0  EFLAGS: 00000002
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] RAX: 00000000006e6282 RBX: 00000000006e61da RCX: 00000000006e61da
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] RDX: 0000000000000df9 RSI: 0000000000000200 RDI: 00000000002a47ac
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] RBP: 00000000002a47ac R08: 0000000000000000 R09: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] R13: ffff88005f483f50 R14: ffff88005f48e738 R15: ffffffff810756c7
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] FS:  00007f7a6e138720(0000) GS:ffff88005f480000(0000) knlGS:0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] CR2: 00007f7a6edf74a4 CR3: 00000000503a0000 CR4: 00000000000007e0
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Process nullmailer-send (pid: 8240, threadinfo ffff88005ae10000, task ffff88003717e870)
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Stack:
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  ffffffff811ba5d5 ffffffff811ba670 0000000000002710 ffffffff816281c0
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  ffffffff81628280 ffff88005f483f50 ffffffff810268c9 ffff88005f48ec10
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  ffffffff8109b3b9 0000000000000086 ffffffff8106f986 00000000505e8763
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Call Trace:
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  <IRQ> 
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff811ba5d5>] ? paravirt_read_tsc+0x5/0x8
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff811ba670>] ? delay_tsc+0x29/0x5e
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810268c9>] ? arch_trigger_all_cpu_backtrace+0x6c/0x7b
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8109b3b9>] ? __rcu_pending+0xba/0x3a3
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8106f986>] ? update_rt_offset+0x2e/0x3a
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810756c7>] ? tick_nohz_handler+0xd0/0xd0
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8109b6c1>] ? rcu_pending+0x1f/0x4e
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8109bc40>] ? rcu_check_callbacks+0x4c/0x69
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810466ca>] ? update_process_times+0x31/0x63
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81075731>] ? tick_sched_timer+0x6a/0x90
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810562fd>] ? __run_hrtimer+0xad/0x136
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810569c9>] ? hrtimer_interrupt+0xd5/0x1b1
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81366bdc>] ? call_softirq+0x1c/0x30
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81025e9c>] ? smp_apic_timer_interrupt+0x6e/0x80
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8136628a>] ? apic_timer_interrupt+0x6a/0x70
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  <EOI> 
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff8107a576>] ? do_raw_spin_lock+0x15/0x1b
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810d736c>] ? do_wp_page+0x406/0x565
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810d8d65>] ? handle_pte_fault+0x75d/0x7b4
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81061f39>] ? set_next_entity+0x32/0x52
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff810d5d7d>] ? pte_offset_kernel+0x16/0x35
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff813637fc>] ? do_page_fault+0x312/0x337
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:23:23 assimilis kernel: [ 5480.304003]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
Sep 23 17:23:23 assimilis kernel: [ 5480.304003] Code: 74 03 e6 80 c3 e6 ed c3 bf 8e 21 00 00 e9 6a 64 1a 00 c3 90 90 90 40 88 f8 e6 70 e4 71 c3 40 88 f0 e6 70 40 88 f8 e6 71 c3 0f 31 <89> c1 48 89 d0 48 c1 e0 20 48 09 c8 c3 41 56 41 55 41 54 55 53 
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] NMI backtrace for cpu 0
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] CPU 0 
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] 
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Pid: 0, comm: swapper/0 Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] RIP: 0010:[<ffffffff81014966>]  [<ffffffff81014966>] mwait_idle+0x7f/0xab
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] RSP: 0018:ffffffff81601f18  EFLAGS: 00000246
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] RAX: 0000000000000000 RBX: ffffffff816855e0 RCX: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffffff81600000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] RBP: 6db6db6db6db6db7 R08: 0000000000000000 R09: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] R10: ffff88005f413680 R11: ffffffff816855e0 R12: ffffffff816e72b0
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] R13: ffff88005f64f580 R14: 000000000008c800 R15: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] FS:  0000000000000000(0000) GS:ffff88005f400000(0000) knlGS:0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] CR2: ffffffffff600400 CR3: 0000000054df4000 CR4: 00000000000007f0
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Process swapper/0 (pid: 0, threadinfo ffffffff81600000, task ffffffff816133f0)
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Stack:
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  00000000ffffffed ffffffff81015024 0000000000000000 23bd54ee1b3c2dfe
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  0000000000000000 ffffffff816a2b59 ffffffff816a25b5 0000000000808000
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  ffffffff816e72b0 2b5001678588b0f6 ffffffff81601fb8 ffffffff816a2120
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Call Trace:
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  [<ffffffff81015024>] ? cpu_idle+0xa7/0xe7
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  [<ffffffff816a2b59>] ? start_kernel+0x3bd/0x3c8
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  [<ffffffff816a25b5>] ? repair_env_string+0x54/0x54
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  [<ffffffff816a2120>] ? early_idt_handlers+0x120/0x120
Sep 23 17:23:23 assimilis kernel: [ 5480.304046]  [<ffffffff816a23d3>] ? x86_64_start_kernel+0x104/0x111
Sep 23 17:23:23 assimilis kernel: [ 5480.304046] Code: d2 65 48 8b 04 25 a0 c6 00 00 48 89 d1 48 2d c8 1f 00 00 0f 01 c8 0f ae f0 e8 90 fc ff ff 85 c0 75 0b 31 c0 48 89 c1 fb 0f 01 c9 <eb> 05 e8 19 fc ff ff 65 8b 3c 25 e0 db 00 00 e8 38 fd ff ff 65 
Sep 23 17:23:51 assimilis kernel: [ 5508.148012] BUG: soft lockup - CPU#1 stuck for 22s! [nullmailer-send:8240]
.... etc.


-- Package-specific info:
** Version:
Linux version 3.5-trunk-amd64 (Debian 3.5.2-1~experimental.1) (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-1) ) #1 SMP Mon Aug 20 04:17:46 UTC 2012

** Command line:
BOOT_IMAGE=/vmlinuz-3.5-trunk-amd64 root=UUID=43979911-0929-4df1-962a-5144bfb10e98 ro quiet

** Not tainted

** Kernel log:
[28618.672003] RDX: 00000000002a47ab RSI: 0000000000000200 RDI: 00000000002a47ac
[28618.672003] RBP: ffffffff816281c0 R08: 0000000000000000 R09: 0000000000000000
[28618.672003] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff81628280
[28618.672003] R13: ffff88005f483f50 R14: ffff88005f48e738 R15: ffffffff810756c7
[28618.672003] FS:  00007f7a6e138720(0000) GS:ffff88005f480000(0000) knlGS:0000000000000000
[28618.672003] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[28618.672003] CR2: 00007f7a6edf7874 CR3: 000000003d67c000 CR4: 00000000000007e0
[28618.672003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28618.672003] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28618.672003] Process nullmailer-send (pid: 28376, threadinfo ffff88003d650000, task ffff880023aaafa0)
[28618.672003] Stack:
[28618.672003]  ffffffff810268c9 ffff88005f48ec10 ffffffff8109b3b9 0000000000000086
[28618.672003]  ffffffff8106f986 00000000505e8763 0000000000000001 0000000000000000
[28618.672003]  0000000000000001 ffff88005f483f50 ffff88005f48e738 ffffffff810756c7
[28618.672003] Call Trace:
[28618.672003]  <IRQ> 
[28618.672003]  [<ffffffff810268c9>] ? arch_trigger_all_cpu_backtrace+0x6c/0x7b
[28618.672003]  [<ffffffff8109b3b9>] ? __rcu_pending+0xba/0x3a3
[28618.672003]  [<ffffffff8106f986>] ? update_rt_offset+0x2e/0x3a
[28618.672003]  [<ffffffff810756c7>] ? tick_nohz_handler+0xd0/0xd0
[28618.672003]  [<ffffffff8109b6c1>] ? rcu_pending+0x1f/0x4e
[28618.672003]  [<ffffffff8109bc40>] ? rcu_check_callbacks+0x4c/0x69
[28618.672003]  [<ffffffff810466ca>] ? update_process_times+0x31/0x63
[28618.672003]  [<ffffffff81075731>] ? tick_sched_timer+0x6a/0x90
[28618.672003]  [<ffffffff810562fd>] ? __run_hrtimer+0xad/0x136
[28618.672003]  [<ffffffff810569c9>] ? hrtimer_interrupt+0xd5/0x1b1
[28618.672003]  [<ffffffff81366bdc>] ? call_softirq+0x1c/0x30
[28618.672003]  [<ffffffff81025e9c>] ? smp_apic_timer_interrupt+0x6e/0x80
[28618.672003]  [<ffffffff8136628a>] ? apic_timer_interrupt+0x6a/0x70
[28618.672003]  <EOI> 
[28618.672003]  [<ffffffff8107a576>] ? do_raw_spin_lock+0x15/0x1b
[28618.672003]  [<ffffffff810d736c>] ? do_wp_page+0x406/0x565
[28618.672003]  [<ffffffff810d8d65>] ? handle_pte_fault+0x75d/0x7b4
[28618.672003]  [<ffffffff81061f39>] ? set_next_entity+0x32/0x52
[28618.672003]  [<ffffffff810d5d7d>] ? pte_offset_kernel+0x16/0x35
[28618.672003]  [<ffffffff813637fc>] ? do_page_fault+0x312/0x337
[28618.672003]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
[28618.672003]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
[28618.672003] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 eb 0e 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 ff c8 75 fb 48 ff c8 c3 48 8b 05 18 0a 49 00 <ff> e0 65 48 8b 14 25 98 35 01 00 48 6b d2 3e 48 8d 04 bd 00 00 
[28618.672046] NMI backtrace for cpu 0
[28618.672046] CPU 0 
[28618.672046] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
[28618.672046] 
[28618.672046] Pid: 0, comm: swapper/0 Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
[28618.672046] RIP: 0010:[<ffffffff81014966>]  [<ffffffff81014966>] mwait_idle+0x7f/0xab
[28618.672046] RSP: 0018:ffffffff81601f18  EFLAGS: 00000246
[28618.672046] RAX: 0000000000000000 RBX: ffffffff816855e0 RCX: 0000000000000000
[28618.672046] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffffff81600000
[28618.672046] RBP: 6db6db6db6db6db7 R08: 0000000000000000 R09: 0000000000000000
[28618.672046] R10: ffff88005f413680 R11: ffffffff816855e0 R12: ffffffff816e72b0
[28618.672046] R13: ffff88005f64f580 R14: 000000000008c800 R15: 0000000000000000
[28618.672046] FS:  0000000000000000(0000) GS:ffff88005f400000(0000) knlGS:0000000000000000
[28618.672046] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[28618.672046] CR2: ffffffffff600400 CR3: 000000005bf58000 CR4: 00000000000007f0
[28618.672046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28618.672046] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28618.672046] Process swapper/0 (pid: 0, threadinfo ffffffff81600000, task ffffffff816133f0)
[28618.672046] Stack:
[28618.672046]  00000000ffffffed ffffffff81015024 0000000000000000 23bd54ee1b3c2dfe
[28618.672046]  0000000000000000 ffffffff816a2b59 ffffffff816a25b5 0000000000808000
[28618.672046]  ffffffff816e72b0 2b5001678588b0f6 ffffffff81601fb8 ffffffff816a2120
[28618.672046] Call Trace:
[28618.672046]  [<ffffffff81015024>] ? cpu_idle+0xa7/0xe7
[28618.672046]  [<ffffffff816a2b59>] ? start_kernel+0x3bd/0x3c8
[28618.672046]  [<ffffffff816a25b5>] ? repair_env_string+0x54/0x54
[28618.672046]  [<ffffffff816a2120>] ? early_idt_handlers+0x120/0x120
[28618.672046]  [<ffffffff816a23d3>] ? x86_64_start_kernel+0x104/0x111
[28618.672046] Code: d2 65 48 8b 04 25 a0 c6 00 00 48 89 d1 48 2d c8 1f 00 00 0f 01 c8 0f ae f0 e8 90 fc ff ff 85 c0 75 0b 31 c0 48 89 c1 fb 0f 01 c9 <eb> 05 e8 19 fc ff ff 65 8b 3c 25 e0 db 00 00 e8 38 fd ff ff 65 
[28644.148012] BUG: soft lockup - CPU#1 stuck for 22s! [nullmailer-send:28376]
[28644.148016] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
[28644.148111] CPU 1 
[28644.148113] Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables mperf cpufreq_stats cpufreq_userspace cpufreq_powersave cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16 binfmt_misc nfsd nfs nfs_acl auth_rpcgss fscache lockd sunrpc ext3 mbcache jbd sha1_generic arc4 ecb ppp_mppe ppp_generic slhc loop fuse joydev hid_generic i915 iTCO_wdt iTCO_vendor_support video drm_kms_helper lpc_ich drm mfd_core snd_intel8x0 snd_ac97_codec snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer i2c_algo_bit rng_core snd soundcore ac97_bus evdev i2c_i801 i2c_core parport_pc parport psmouse dcdbas pcspkr serio_raw processor button thermal_sys xfs dm_mod sg sr_mod cdrom sd_mod crc_t10dif usb_storage usbhid hid uas microcode ata_generic uhci_hcd ata_piix ehci_hcd libata scsi_mod usbcore tg3 libphy usb_common [last unloaded: scsi_wait_scan]
[28644.148207] 
[28644.148210] Pid: 28376, comm: nullmailer-send Not tainted 3.5-trunk-amd64 #1 Dell Inc.                 OptiPlex GX620               /0FH884
[28644.148216] RIP: 0010:[<ffffffff8107a576>]  [<ffffffff8107a576>] do_raw_spin_lock+0x15/0x1b
[28644.148223] RSP: 0000:ffff88003d651d30  EFLAGS: 00000202
[28644.148225] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
[28644.148228] RDX: 0000000000000000 RSI: 00007f7a6edf7874 RDI: ffffea00007cdf70
[28644.148231] RBP: ffff8800502b24a8 R08: 0000000000000000 R09: 0000000000000000
[28644.148234] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8162f310
[28644.148237] R13: 0000000000000000 R14: 00000000000200da R15: ffff880054ca8480
[28644.148240] FS:  00007f7a6e138720(0000) GS:ffff88005f480000(0000) knlGS:0000000000000000
[28644.148244] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[28644.148247] CR2: 00007f7a6edf7874 CR3: 000000003d67c000 CR4: 00000000000007e0
[28644.148250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28644.148253] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28644.148257] Process nullmailer-send (pid: 28376, threadinfo ffff88003d650000, task ffff880023aaafa0)
[28644.148259] Stack:
[28644.148261]  ffffffff810d736c ffff880015113bf0 ffff88005a36a1c0 ffffea00007cdf70
[28644.148267]  ffff88005a36a1c0 0000000000000028 00000000000000cc 00007f7a6d97e000
[28644.148273]  ffffea00014d00d8 ffff88005af53a28 ffff8800502b24a8 ffff880023adcfb8
[28644.148280] Call Trace:
[28644.148285]  [<ffffffff810d736c>] ? do_wp_page+0x406/0x565
[28644.148290]  [<ffffffff810d8d65>] ? handle_pte_fault+0x75d/0x7b4
[28644.148295]  [<ffffffff81061f39>] ? set_next_entity+0x32/0x52
[28644.148299]  [<ffffffff810d5d7d>] ? pte_offset_kernel+0x16/0x35
[28644.148303]  [<ffffffff813637fc>] ? do_page_fault+0x312/0x337
[28644.148308]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
[28644.148313]  [<ffffffff81360be5>] ? page_fault+0x25/0x30
[28644.148315] Code: 05 e8 4f 10 14 00 c3 f0 81 2f 00 00 10 00 74 05 e8 20 10 14 00 c3 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 d0 74 07 f3 90 <66> 8b 07 eb f4 c3 8b 17 31 c0 89 d1 c1 e9 10 66 39 ca 75 14 8d 

** Model information
sys_vendor: Dell Inc.                
product_name: OptiPlex GX620               
product_version: 
chassis_vendor: Dell Inc.                
chassis_version: 
bios_vendor: Dell Inc.                
bios_version: A07
board_vendor: Dell Inc.          
board_name: 0FH884
board_version:    

** Loaded modules:
ip6table_filter
ip6_tables
iptable_filter
ip_tables
ebtable_nat
ebtables
x_tables
mperf
cpufreq_stats
cpufreq_userspace
cpufreq_powersave
cpufreq_conservative
ppdev
lp
bnep
rfcomm
bluetooth
rfkill
crc16
binfmt_misc
nfsd
nfs
nfs_acl
auth_rpcgss
fscache
lockd
sunrpc
ext3
mbcache
jbd
sha1_generic
arc4
ecb
ppp_mppe
ppp_generic
slhc
loop
fuse
joydev
hid_generic
i915
iTCO_wdt
iTCO_vendor_support
video
drm_kms_helper
lpc_ich
drm
mfd_core
snd_intel8x0
snd_ac97_codec
snd_pcm
snd_page_alloc
snd_seq
snd_seq_device
snd_timer
i2c_algo_bit
rng_core
snd
soundcore
ac97_bus
evdev
i2c_i801
i2c_core
parport_pc
parport
psmouse
dcdbas
pcspkr
serio_raw
processor
button
thermal_sys
xfs
dm_mod
sg
sr_mod
cdrom
sd_mod
crc_t10dif
usb_storage
usbhid
hid
uas
microcode
ata_generic
uhci_hcd
ata_piix
ehci_hcd
libata
scsi_mod
usbcore
tg3
libphy
usb_common

** Network interface configuration:

auto lo
iface lo inet loopback

allow-hotplug eth0

** Network status:
*** IP interfaces and addresses:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:18:8b:0d:c2:a5 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.8/24 brd 192.168.0.255 scope global eth0
    inet6 fe80::218:8bff:fe0d:c2a5/64 scope link 
       valid_lft forever preferred_lft forever

*** Device statistics:
Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
  eth0: 69415853  496553    0    0    0     0          0       405 1042000196  827326    0    0    0     0       0          0
    lo: 578386152   72382    0    0    0     0          0         0 578386152   72382    0    0    0     0       0          0

*** Protocol statistics:
Ip:
    567319 total packets received
    0 forwarded
    0 incoming packets discarded
    567319 incoming packets delivered
    299842 requests sent out
    80 dropped because of missing route
Icmp:
    2 ICMP messages received
    0 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 2
    0 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
IcmpMsg:
        InType3: 2
Tcp:
    18 active connections openings
    19 passive connection openings
    0 failed connection attempts
    5 connection resets received
    3 connections established
    475644 segments received
    809471 segments send out
    386 segments retransmited
    0 bad segments received.
    5 resets sent
Udp:
    91657 packets received
    0 packets to unknown port received.
    0 packet receive errors
    95522 packets sent
UdpLite:
TcpExt:
    14 TCP sockets finished time wait in fast timer
    3148 delayed acks sent
    4 delayed acks further delayed because of locked socket
    Quick ack mode was activated 103 times
    8 packets directly queued to recvmsg prequeue.
    63873 packet headers predicted
    24567 acknowledgments not containing data payload received
    364462 predicted acknowledgments
    135 times recovered from packet loss by selective acknowledgements
    7 congestion windows recovered without slow start after partial ack
    159 fast retransmits
    18 forward retransmits
    175 retransmits in slow start
    21 other TCP timeouts
    7 SACK retransmits failed
    103 DSACKs sent for old packets
    188 DSACKs received
    1 connections reset due to unexpected data
    TCPDSACKIgnoredNoUndo: 181
    TCPSackShifted: 8833
    TCPSackMerged: 1093
    TCPSackShiftFallback: 734
    TCPDeferAcceptDrop: 9
    TCPRcvCoalesce: 5835
IpExt:
    InMcastPkts: 408
    OutMcastPkts: 46
    InBcastPkts: 62
    OutBcastPkts: 14
    InOctets: 638787863
    OutOctets: 1574302142
    InMcastOctets: 123354
    OutMcastOctets: 5449
    InBcastOctets: 3641
    OutBcastOctets: 656


** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub [8086:2770] (rev 02)
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: agpgart-intel

00:01.0 PCI bridge [0604]: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port [8086:2771] (rev 02) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	Memory behind bridge: fe900000-fe9fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:02.0 VGA compatible controller [0300]: Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2772] (rev 02) (prog-if 00 [VGA controller])
	Subsystem: Dell Device [1028:01ad]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at feb00000 (32-bit, non-prefetchable) [size=512K]
	Region 1: I/O ports at e898 [size=8]
	Region 2: Memory at e0000000 (32-bit, prefetchable) [size=256M]
	Region 3: Memory at feac0000 (32-bit, non-prefetchable) [size=256K]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: i915

00:02.1 Display controller [0380]: Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2776] (rev 02)
	Subsystem: Dell Device [1028:01ad]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Region 0: Memory at feb80000 (32-bit, non-prefetchable) [size=512K]
	Capabilities: <access denied>

00:1c.0 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 1 [8086:27d0] (rev 01) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: 00001000-00001fff
	Memory behind bridge: fe800000-fe8fffff
	Prefetchable memory behind bridge: 0000000060000000-00000000601fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1c.1 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 2 [8086:27d2] (rev 01) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: 00003000-00003fff
	Memory behind bridge: fe700000-fe7fffff
	Prefetchable memory behind bridge: 0000000060200000-00000000603fffff
	Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1d.0 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 [8086:27c8] (rev 01) (prog-if 00 [UHCI])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 21
	Region 4: I/O ports at ff80 [size=32]
	Kernel driver in use: uhci_hcd

00:1d.1 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 [8086:27c9] (rev 01) (prog-if 00 [UHCI])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin B routed to IRQ 22
	Region 4: I/O ports at ff60 [size=32]
	Kernel driver in use: uhci_hcd

00:1d.2 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 [8086:27ca] (rev 01) (prog-if 00 [UHCI])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin C routed to IRQ 18
	Region 4: I/O ports at ff40 [size=32]
	Kernel driver in use: uhci_hcd

00:1d.3 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 [8086:27cb] (rev 01) (prog-if 00 [UHCI])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin D routed to IRQ 23
	Region 4: I/O ports at ff20 [size=32]
	Kernel driver in use: uhci_hcd

00:1d.7 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller [8086:27cc] (rev 01) (prog-if 20 [EHCI])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 21
	Region 0: Memory at ffa80800 (32-bit, non-prefetchable) [size=1K]
	Capabilities: <access denied>
	Kernel driver in use: ehci_hcd

00:1e.0 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev e1) (prog-if 01 [Subtractive decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=32
	Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
	Capabilities: <access denied>

00:1e.2 Multimedia audio controller [0401]: Intel Corporation 82801G (ICH7 Family) AC'97 Audio Controller [8086:27de] (rev 01)
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 23
	Region 0: I/O ports at ec00 [size=256]
	Region 1: I/O ports at e8c0 [size=64]
	Region 2: Memory at feabfa00 (32-bit, non-prefetchable) [size=512]
	Region 3: Memory at feabf900 (32-bit, non-prefetchable) [size=256]
	Capabilities: <access denied>
	Kernel driver in use: snd_intel8x0

00:1f.0 ISA bridge [0601]: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge [8086:27b8] (rev 01)
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: <access denied>
	Kernel driver in use: lpc_ich

00:1f.1 IDE interface [0101]: Intel Corporation 82801G (ICH7 Family) IDE Controller [8086:27df] (rev 01) (prog-if 8a [Master SecP PriP])
	Subsystem: Dell Device [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 16
	Region 0: I/O ports at 01f0 [size=8]
	Region 1: I/O ports at 03f4 [size=1]
	Region 2: I/O ports at 0170 [size=8]
	Region 3: I/O ports at 0374 [size=1]
	Region 4: I/O ports at ffa0 [size=16]
	Kernel driver in use: ata_piix

00:1f.2 IDE interface [0101]: Intel Corporation N10/ICH7 Family SATA Controller [IDE mode] [8086:27c0] (rev 01) (prog-if 8f [Master SecP SecO PriP PriO])
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin C routed to IRQ 20
	Region 0: I/O ports at fe00 [size=8]
	Region 1: I/O ports at fe10 [size=4]
	Region 2: I/O ports at fe20 [size=8]
	Region 3: I/O ports at fe30 [size=4]
	Region 4: I/O ports at fea0 [size=16]
	Capabilities: <access denied>
	Kernel driver in use: ata_piix

00:1f.3 SMBus [0c05]: Intel Corporation N10/ICH 7 Family SMBus Controller [8086:27da] (rev 01)
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Interrupt: pin B routed to IRQ 17
	Region 4: I/O ports at e8a0 [size=32]
	Kernel driver in use: i801_smbus

02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express [14e4:1677] (rev 01)
	Subsystem: Dell OptiPlex GX620 [1028:01ad]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at fe8f0000 (64-bit, non-prefetchable) [size=64K]
	Expansion ROM at <ignored> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: tg3


** USB devices:
Bus 001 Device 002: ID 152d:2338 JMicron Technology Corp. / JMicron USA Technology Corp. JM20337 Hi-Speed USB to SATA & PATA Combo Bridge
Bus 002 Device 002: ID 413c:1003 Dell Computer Corp. Keyboard Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 413c:2010 Dell Computer Corp. Keyboard


-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (102, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.5-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages linux-image-3.5-trunk-amd64 depends on:
ii  debconf [debconf-2.0]                   1.5.46
ii  initramfs-tools [linux-initramfs-tool]  0.107
ii  kmod                                    9-2
ii  linux-base                              3.5
ii  module-init-tools                       9-2

Versions of packages linux-image-3.5-trunk-amd64 recommends:
ii  firmware-linux-free  3.1

Versions of packages linux-image-3.5-trunk-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-pc                 1.99-22.1
pn  linux-doc-3.5           <none>

Versions of packages linux-image-3.5-trunk-amd64 is related to:
pn  firmware-atheros        <none>
pn  firmware-bnx2           <none>
pn  firmware-bnx2x          <none>
pn  firmware-brcm80211      <none>
pn  firmware-intelwimax     <none>
pn  firmware-ipw2x00        <none>
pn  firmware-ivtv           <none>
pn  firmware-iwlwifi        <none>
pn  firmware-libertas       <none>
pn  firmware-linux          <none>
pn  firmware-linux-nonfree  <none>
pn  firmware-myricom        <none>
pn  firmware-netxen         <none>
pn  firmware-qlogic         <none>
pn  firmware-ralink         <none>
pn  firmware-realtek        <none>
pn  xen-hypervisor          <none>

-- debconf information:
* linux-image-3.5-trunk-amd64/postinst/missing-firmware-3.5-trunk-amd64:
  linux-image-3.5-trunk-amd64/postinst/ignoring-ramdisk:
  linux-image-3.5-trunk-amd64/prerm/removing-running-kernel-3.5-trunk-amd64: true
  linux-image-3.5-trunk-amd64/postinst/depmod-error-initrd-3.5-trunk-amd64: false


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