Здравствуйте уважаемая редакция. Серверов с ядром ovz-el на серверах становится все больше и больше. И багов соответственно. Есть один сервер на котором периодически (1-2 раза в неделю) происходит ребут в результате kernel panic. Перед ребутом LA уходит в космос - выше 200. Ядро 2.6.32-ovz-el-alt24, бранч t6. Стоит 2 SATA диска в raid1 на mdadm на котором установлена система и все служебные VPS И 2 SAS диска из которых собран raid1 и с него работает одна рабочая VPS. Диски по smart живые, ошибок нет. В логе вот такое перед ребутом вижу: Jul 4 21:05:51 ua83 kernel: [293760.725062] INFO: task flush-253:1:1294 blocked for more than 120 seconds. Jul 4 21:05:59 ua83 kernel: [293760.725069] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 4 21:06:26 ua83 kernel: [293760.725074] flush-253:1 D ffff8801dcb82c90 0 1294 2 0x00000000 Jul 4 21:07:33 ua83 kernel: [293760.725083] ffff8801d5a0ba10 0000000000000046 0000000000000000 ffffffffa02cc12c Jul 4 21:07:33 ua83 kernel: [293760.725091] ffff88013696e5a8 ffffffff811b3e70 ffffffffa00d3c40 00000001117b8ec4 Jul 4 21:07:33 ua83 kernel: [293760.725098] ffff8801dcb83270 ffff8801d5a0bfd8 000000000000f7c8 ffff8801dcb83270 Jul 4 21:07:33 ua83 kernel: [293760.725106] Call Trace: Jul 4 21:07:33 ua83 kernel: [293760.725132] [] ? dm_table_unplug_all+0x5c/0xd0 [dm_mod] Jul 4 21:07:33 ua83 kernel: [293760.725155] [] ? end_buffer_async_write+0x0/0x190 Jul 4 21:07:33 ua83 kernel: [293760.725185] [] ? ext4_bh_delay_or_unwritten+0x0/0x30 [ext4] Jul 4 21:07:33 ua83 kernel: [293760.725195] [] io_schedule+0xa3/0x110 Jul 4 21:07:33 ua83 kernel: [293760.725202] [] ? sync_page+0x0/0x50 Jul 4 21:07:45 ua83 kernel: [293760.725207] [] sync_page+0x3d/0x50 Jul 4 21:08:27 ua83 kernel: [293760.725212] [] __wait_on_bit+0x5f/0x90 Jul 4 21:08:29 ua83 kernel: [293760.725218] [] wait_on_page_bit+0x73/0x80 Jul 4 21:08:38 ua83 kernel: [293760.725225] [] ? wake_bit_function+0x0/0x50 Jul 4 21:08:38 ua83 kernel: [293760.725234] [] ? pagevec_lookup_tag+0x25/0x40 Jul 4 21:08:38 ua83 kernel: [293760.725239] [] wait_on_page_writeback_range+0xfb/0x190 Jul 4 21:08:38 ua83 kernel: [293760.725245] [] filemap_fdatawait+0x2f/0x40 Jul 4 21:08:38 ua83 kernel: [293760.725252] [] writeback_single_inode+0x238/0x2e0 Jul 4 21:08:38 ua83 kernel: [293760.725258] [] writeback_sb_inodes+0xf6/0x1b0 Jul 4 21:08:38 ua83 kernel: [293760.725263] [] wb_writeback+0x170/0x400 Jul 4 21:08:38 ua83 kernel: [293760.725268] [] ? thread_return+0x4e/0x862 Jul 4 21:08:38 ua83 kernel: [293760.725276] [] ? del_timer_sync+0x2a/0x40 Jul 4 21:08:38 ua83 kernel: [293760.725281] [] wb_do_writeback+0xc5/0x250 Jul 4 21:08:38 ua83 kernel: [293760.725286] [] ? process_timeout+0x0/0x10 Jul 4 21:08:38 ua83 kernel: [293760.725292] [] bdi_writeback_task+0x67/0x1c0 Jul 4 21:08:38 ua83 kernel: [293760.725297] [] ? bit_waitqueue+0x17/0xc0 Jul 4 21:08:38 ua83 kernel: [293760.725305] [] bdi_start_fn+0x86/0x100 Jul 4 21:08:38 ua83 kernel: [293760.725310] [] ? bdi_start_fn+0x0/0x100 Jul 4 21:08:38 ua83 kernel: [293760.725315] [] kthread+0xc0/0xe0 Jul 4 21:08:38 ua83 kernel: [293760.725321] [] child_rip+0xa/0x20 Jul 4 21:08:38 ua83 kernel: [293760.725326] [] ? kthread+0x0/0xe0 Jul 4 21:08:38 ua83 kernel: [293760.725331] [] ? child_rip+0x0/0x20 Jul 4 21:08:38 ua83 kernel: [293760.725336] INFO: task jbd2/dm-1-8:1306 blocked for more than 120 seconds. Jul 4 21:09:58 ua83 kernel: [293760.725340] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 4 21:10:37 ua83 kernel: [293760.725344] jbd2/dm-1-8 D ffff8801da9ea640 0 1306 2 0x00000000 Jul 4 21:10:38 ua83 kernel: [293760.725351] ffff8801d4951b00 0000000000000046 ffff8801d4951ac0 ffffffffa02cc12c Jul 4 21:10:38 ua83 kernel: [293760.725358] ffff880119e48808 ffff880119eddb40 ffff8801d4951ab0 ffffffff8109c569 Jul 4 21:10:38 ua83 kernel: [293760.725365] ffff8801da9eac20 ffff8801d4951fd8 000000000000f7c8 ffff8801da9eac20 Jul 4 21:10:38 ua83 kernel: [293760.725372] Call Trace: Jul 4 21:10:38 ua83 kernel: [293760.725381] [] ? dm_table_unplug_all+0x5c/0xd0 [dm_mod] Jul 4 21:10:38 ua83 kernel: [293760.725388] [] ? ktime_get_ts+0xa9/0xe0 Jul 4 21:10:38 ua83 kernel: [293760.725394] [] ? ktime_get_ts+0xa9/0xe0 Jul 4 21:10:38 ua83 kernel: [293760.725399] [] io_schedule+0xa3/0x110 Jul 4 21:10:38 ua83 kernel: [293760.725404] [] ? sync_page+0x0/0x50 Jul 4 21:10:38 ua83 kernel: [293760.725409] [] sync_page+0x3d/0x50 Jul 4 21:10:38 ua83 kernel: [293760.725414] [] __wait_on_bit+0x5f/0x90 Jul 4 21:10:38 ua83 kernel: [293760.725419] [] wait_on_page_bit+0x73/0x80 Jul 4 21:10:38 ua83 kernel: [293760.725425] [] ? wake_bit_function+0x0/0x50 Jul 4 21:10:38 ua83 kernel: [293760.725430] [] ? pagevec_lookup_tag+0x25/0x40 Jul 4 21:10:38 ua83 kernel: [293760.725436] [] wait_on_page_writeback_range+0xfb/0x190 Jul 4 21:10:38 ua83 kernel: [293760.725443] [] ? bio_alloc_bioset+0x5b/0xf0 Jul 4 21:10:38 ua83 kernel: [293760.725449] [] filemap_fdatawait+0x2f/0x40 Jul 4 21:10:38 ua83 kernel: [293760.725462] [] jbd2_journal_commit_transaction+0x7f0/0x1490 [jbd2] Jul 4 21:10:38 ua83 kernel: [293760.725469] [] ? autoremove_wake_function+0x0/0x40 Jul 4 21:10:38 ua83 kernel: [293760.725480] [] kjournald2+0xb8/0x220 [jbd2] Jul 4 21:10:38 ua83 kernel: [293760.725486] [] ? autoremove_wake_function+0x0/0x40 Jul 4 21:10:38 ua83 kernel: [293760.725496] [] ? kjournald2+0x0/0x220 [jbd2] Jul 4 21:10:38 ua83 kernel: [293760.725501] [] kthread+0xc0/0xe0 Jul 4 21:10:38 ua83 kernel: [293760.725506] [] child_rip+0xa/0x20 Jul 4 21:10:38 ua83 kernel: [293760.725511] [] ? kthread+0x0/0xe0 Jul 4 21:10:38 ua83 kernel: [293760.725516] [] ? child_rip+0x0/0x20 и т.д. Подскажите что делать? Куда еще можно посмотреть? -- WBR, Dubrovskiy Viacheslav