Ubuntu
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  1. Bug #276476
  2. Comment #46

Comment 46 for bug 276476

Revision history for this message
Hurukan (pelat-laurent) wrote : Re: INFO: task blocked for more than 120 seconds causes system freeze

When I add kernel.hung_task_timeout_secs = 0 in my sysctl.conf, Most of the time, I have small freeze from 1/2 seconds max...
But sometimes, I have a big freeze (need a reboot). The disk is new (and there is no problem on it - checked before...)

Here a trace:
Feb 28 21:05:10 redshield kernel: [ 1.760466] Hardware name: P55A-UD5
Feb 28 21:05:10 redshield kernel: [ 1.760467] Modules linked in:
Feb 28 21:05:10 redshield kernel: [ 1.760469] Pid: 0, comm: swapper Not tainted 2.6.31-19-generic #56-Ubuntu
Feb 28 21:05:10 redshield kernel: [ 1.760471] Call Trace:
Feb 28 21:05:10 redshield kernel: [ 1.760475] [<ffffffff8105e678>] warn_slowpath_common+0x78/0xb0
Feb 28 21:05:10 redshield kernel: [ 1.760477] [<ffffffff8105e6bf>] warn_slowpath_null+0xf/0x20
Feb 28 21:05:10 redshield kernel: [ 1.760479] [<ffffffff81034335>] hpet_next_event+0x75/0x90
Feb 28 21:05:10 redshield kernel: [ 1.760481] [<ffffffff8103437b>] hpet_legacy_next_event+0xb/0x10
Feb 28 21:05:10 redshield kernel: [ 1.760484] [<ffffffff8108556f>] clockevents_program_event+0x4f/0x90
Feb 28 21:05:10 redshield kernel: [ 1.760486] [<ffffffff81086a60>] tick_dev_program_event+0x40/0xd0
Feb 28 21:05:10 redshield kernel: [ 1.760489] [<ffffffff810863f6>] tick_broadcast_oneshot_control+0x116/0x120
Feb 28 21:05:10 redshield kernel: [ 1.760491] [<ffffffff81085ce0>] tick_notify+0x130/0x1a0
Feb 28 21:05:10 redshield kernel: [ 1.760494] [<ffffffff8152ca37>] notifier_call_chain+0x47/0x90
Feb 28 21:05:10 redshield kernel: [ 1.760496] [<ffffffff8107d6d1>] raw_notifier_call_chain+0x11/0x20
Feb 28 21:05:10 redshield kernel: [ 1.760498] [<ffffffff81085374>] clockevents_notify+0x34/0xa0
Feb 28 21:05:10 redshield kernel: [ 1.760500] [<ffffffff812d7eea>] lapic_timer_state_broadcast+0x41/0x43
Feb 28 21:05:10 redshield kernel: [ 1.760502] [<ffffffff812d8447>] acpi_idle_enter_bm+0x185/0x2bf
Feb 28 21:05:10 redshield kernel: [ 1.760504] [<ffffffff812d82b4>] ? acpi_idle_enter_c1+0xae/0xbc
Feb 28 21:05:10 redshield kernel: [ 1.760507] [<ffffffff813feadb>] cpuidle_idle_call+0x9b/0x100
Feb 28 21:05:10 redshield kernel: [ 1.760510] [<ffffffff81010e12>] cpu_idle+0xb2/0x100
Feb 28 21:05:10 redshield kernel: [ 1.760512] [<ffffffff81524296>] start_secondary+0xa9/0xab
Feb 28 21:05:10 redshield kernel: [ 1.760516] ---[ end trace dd8604855130fcfb ]---
Feb 28 21:05:10 redshield kernel: [ 1.761189] PM: Resume from disk failed.

I presume it's due to the same bug, maybe it can help.