Created attachment 4870 [details]
Лог падения планировщика

После обновления до 2.6.38-std-def cсистема стала периодически виснуть.

Судя по логам проблема в планировщике задач:
Apr  6 21:31:31 base kernel: [181320.324036] INFO: task crond:5949 blocked for more than 120 seconds.
Apr  6 21:31:35 base kernel: [181320.324040] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr  6 21:31:39 base kernel: [181320.324043] crond           D eaf89d94     0  5949      1 0x00000000
Apr  6 21:31:40 base kernel: [181320.324049]  eaf89da4 00000082 00000002 eaf89d94 00000000 f0e385ec eaf89d14 c10c0898
Apr  6 21:31:40 base kernel: [181320.324055]  f5096df0 c15483c0 efa311f0 c15483c0 efa31478 4b64dd1e 0000a4b9 c15483c0
Apr  6 21:31:40 base kernel: [181320.324061]  c15483c0 c15483c0 f44ec040 0000000a 4b643b83 0000a4b9 efa311f0 eaf89d68
Apr  6 21:31:40 base kernel: [181320.324068] Call Trace:
Apr  6 21:31:40 base kernel: [181320.324077]  [<c10c0898>] ? __inc_zone_page_state+0x18/0x20
Apr  6 21:31:40 base kernel: [181320.324106]  [<f7f73d70>] ? reiserfs_get_block+0x0/0x1480 [reiserfs]
Apr  6 21:31:40 base kernel: [181320.324111]  [<c1063449>] ? ktime_get_ts+0xe9/0x120
Apr  6 21:31:40 base kernel: [181320.324115]  [<c13341ba>] io_schedule+0x5a/0xa0
Apr  6 21:31:40 base kernel: [181320.324120]  [<c10ad7e5>] sync_page+0x35/0x40
Apr  6 21:31:40 base kernel: [181320.324124]  [<c13346f5>] __wait_on_bit+0x45/0x70
Apr  6 21:31:40 base kernel: [181320.324127]  [<c10ad7b0>] ? sync_page+0x0/0x40
Apr  6 21:31:40 base kernel: [181320.324131]  [<c10ad966>] wait_on_page_bit+0x86/0x90
Apr  6 21:31:40 base kernel: [181320.324136]  [<c105a010>] ? wake_bit_function+0x0/0x60
Apr  6 21:31:40 base kernel: [181320.324140]  [<c10af7d9>] __lock_page_or_retry+0x49/0x70
Apr  6 21:31:40 base kernel: [181320.324143]  [<c10afad6>] filemap_fault+0x2d6/0x3e0
Apr  6 21:31:40 base kernel: [181320.324147]  [<c10c4efb>] __do_fault+0x3b/0x490
Apr  6 21:31:40 base kernel: [181320.324152]  [<c10c7f63>] handle_pte_fault+0x83/0x910
Apr  6 21:31:40 base kernel: [181320.324162]  [<c10b4a35>] ? __free_pages+0x35/0x40
Apr  6 21:31:40 base kernel: [181320.324165]  [<c102a476>] ? kmap_atomic_prot+0xd6/0x100
Apr  6 21:31:40 base kernel: [181320.324169]  [<c10c88f6>] handle_mm_fault+0x106/0x220
Apr  6 21:31:40 base kernel: [181320.324174]  [<c1338ee5>] do_page_fault+0x135/0x420
Apr  6 21:31:40 base kernel: [181320.324179]  [<c11b662e>] ? copy_to_user+0x2e/0x50
Apr  6 21:31:40 base kernel: [181320.324191]  [<c10fe43d>] ? sys_select+0x3d/0xb0
Apr  6 21:31:40 base kernel: [181320.324194]  [<c1338db0>] ? do_page_fault+0x0/0x420
Apr  6 21:31:40 base kernel: [181320.324198]  [<c133663e>] error_code+0x5a/0x60
Apr  6 21:31:40 base kernel: [181320.324202]  [<c1338db0>] ? do_page_fault+0x0/0x420


Ключевой момент здесь падении, который происходит после записей вида:
INFO: task crond:6206 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message