Package:linux-image-2.6.26-2-amd64
Version : 2.6.26-21lenny4
Severity: important
I'm using Debian lenny and I'm experiencing this bug for about two days ago , the server was running fine about six months ago ,until those two days , this behaviour happened three times ,
and can't find a way to reproduce this behaviour as it happens in random times , each time the server freezes and no way to login using ssh ,
all i can do rebooting the machine via sysreq button. the server is running apache2, php5, no database on this server.
Server hardware (Dell PowerEdge 2950) :
Cpu : Two Quad-Core Intel(R) Xeon(R) CPU E5440 @ 2.83GHz
Memory : 8 GB
here's a sample from the kernel log :
May 21 17:19:29 debian-srv kernel: [88903.681061] INFO: task pdflush:275 blocked for more than 120 seconds.
May 21 17:19:29 debian-srv kernel: [88903.681117] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 21 17:19:29 debian-srv kernel: [88903.681205] pdflush D ffff81022c9d3000 0 275 2
May 21 17:19:29 debian-srv kernel: [88903.681208] ffff81022cf6db80 0000000000000046 0000000000000000 ffff81022f3b5140
May 21 17:19:29 debian-srv kernel: [88903.681211] ffff81022f3d3770 ffff81022f2ae380 ffff81022f3d39f8 000000058030ca4f
May 21 17:19:29 debian-srv kernel: [88903.681213] 0000000000000000 ffff81022f3b5140 0000000000000000 ffff8101a9e8b340
May 21 17:19:29 debian-srv kernel: [88903.681215] Call Trace:
May 21 17:19:29 debian-srv kernel: [88903.681236] [<ffffffffa00b5b9b>] :jbd:start_this_handle+0x289/0x304
May 21 17:19:29 debian-srv kernel: [88903.681241] [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
May 21 17:19:29 debian-srv kernel: [88903.681244] [<ffffffff802294c0>] find_busiest_group+0x254/0x6dc
May 21 17:19:29 debian-srv kernel: [88903.681249] [<ffffffffa00b5cb1>] :jbd:journal_start+0x9b/0xd2
May 21 17:19:29 debian-srv kernel: [88903.681259] [<ffffffffa01470d1>] :ext3:ext3_ordered_writepage+0x4e/0x16f
May 21 17:19:29 debian-srv kernel: [88903.681263] [<ffffffff802770c3>] __writepage+0xa/0x23
May 21 17:19:29 debian-srv kernel: [88903.681281] [<ffffffff80277588>] write_cache_pages+0x182/0x2b1
May 21 17:19:29 debian-srv kernel: [88903.681283] [<ffffffff802770b9>] __writepage+0x0/0x23
May 21 17:19:29 debian-srv kernel: [88903.681288] [<ffffffff80428f8f>] thread_return+0x6b/0xac
May 21 17:19:29 debian-srv kernel: [88903.681291] [<ffffffff8023ce81>] lock_timer_base+0x26/0x4b
May 21 17:19:29 debian-srv kernel: [88903.681295] [<ffffffff802776fa>] do_writepages+0x27/0x2d
May 21 17:19:29 debian-srv kernel: [88903.681298] [<ffffffff802b6734>] __writeback_single_inode+0x144/0x29d
May 21 17:19:29 debian-srv kernel: [88903.681302] [<ffffffff8026f647>] delayacct_end+0x7d/0x88
May 21 17:19:29 debian-srv kernel: [88903.681305] [<ffffffff802b6bf8>] sync_sb_inodes+0x1b1/0x293
May 21 17:19:29 debian-srv kernel: [88903.681308] [<ffffffff802b7026>] writeback_inodes+0x62/0xb3
May 21 17:19:29 debian-srv kernel: [88903.681311] [<ffffffff80277f4c>] background_writeout+0x87/0xbb
May 21 17:19:29 debian-srv kernel: [88903.681314] [<ffffffff8027841a>] pdflush+0x0/0x211
May 21 17:19:29 debian-srv kernel: [88903.681316] [<ffffffff8027857e>] pdflush+0x164/0x211
May 21 17:19:29 debian-srv kernel: [88903.681318] [<ffffffff80277ec5>] background_writeout+0x0/0xbb
May 21 17:19:29 debian-srv kernel: [88903.681334] [<ffffffff80245feb>] kthread+0x47/0x74
May 21 17:19:29 debian-srv kernel: [88903.681337] [<ffffffff8023008d>] schedule_tail+0x27/0x5c
May 21 17:19:29 debian-srv kernel: [88903.681339] [<ffffffff8020cf38>] child_rip+0xa/0x12
May 21 17:19:29 debian-srv kernel: [88903.681343] [<ffffffff80245fa4>] kthread+0x0/0x74
May 21 17:19:29 debian-srv kernel: [88903.681345] [<ffffffff8020cf2e>] child_rip+0x0/0x12
The Full report is found in attachment , and please let me know if any additional information are required
Regards