Happens to me too! And there's a lot of people with this problem, Ubuntu 10 have this too. Look the google search (last week):
http://www.google.com.br/search?q=task+blocked+for+more+than+120+seconds&hl=pt-BR&tbo=1&prmdo=1&output=search&source=lnt&tbs=qdr:w&ei=pyf9S5fkIdCKuAfdkoGBBg&sa=X&oi=tool&resnum=4&ct=tlink&ved=0CAoQpwU Happens a lot with me with Xen in the Poweredges. Then i changed the DomUs kernel to bigmem and PyGrub, its more stable now. I think Xen works better with 32 bits DomUs. If anyone knows how to fix this, please share. Thank you. On Sat, May 22, 2010 at 4:27 AM, Muhammad Akl <muhammad....@gmail.com>wrote: > > 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 > > >
