Comment 25 for bug 561210

I'm running
Linux io 2.6.32-23-server #37-Ubuntu SMP Fri Jun 11 09:11:11 UTC 2010 x86_64 GNU/Linux
with all upgrades installed and I got a freeze today. Since this is a multi-user file server I'm not sure what exactly was going on at the time. Unfortunately, I cannot try out different kernels either as the machine is always in use.

Jul 7 11:29:57 io kernel: [254640.440019] INFO: task jbd2/sdb-8:942 blocked for more than 120 seconds.
Jul 7 11:29:57 io kernel: [254640.440033] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jul 7 11:29:57 io kernel: [254640.440042] jbd2/sdb-8 D 00000000ffffffff 0 942 2 0x00000000
Jul 7 11:29:57 io kernel: [254640.440047] ffff88007bd71d20 0000000000000046 0000000000015bc0 0000000000015bc0
Jul 7 11:29:57 io kernel: [254640.440052] ffff88007bff9ab0 ffff88007bd71fd8 0000000000015bc0 ffff88007bff96f0
Jul 7 11:29:57 io kernel: [254640.440056] 0000000000015bc0 ffff88007bd71fd8 0000000000015bc0 ffff88007bff9ab0
Jul 7 11:29:57 io kernel: [254640.440060] Call Trace:
Jul 7 11:29:57 io kernel: [254640.440069] [<ffffffff8121b9a1>] jbd2_journal_commit_transaction+0x1c1/0x1250
Jul 7 11:29:57 io kernel: [254640.440075] [<ffffffff81076c7c>] ? lock_timer_base+0x3c/0x70
Jul 7 11:29:57 io kernel: [254640.440080] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40
Jul 7 11:29:57 io kernel: [254640.440084] [<ffffffff81222f6d>] kjournald2+0xbd/0x220
Jul 7 11:29:57 io kernel: [254640.440088] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40
Jul 7 11:29:57 io kernel: [254640.440091] [<ffffffff81222eb0>] ? kjournald2+0x0/0x220
Jul 7 11:29:57 io kernel: [254640.440094] [<ffffffff81084d16>] kthread+0x96/0xa0
Jul 7 11:29:57 io kernel: [254640.440099] [<ffffffff810141ea>] child_rip+0xa/0x20
Jul 7 11:29:57 io kernel: [254640.440102] [<ffffffff81084c80>] ? kthread+0x0/0xa0
Jul 7 11:29:57 io kernel: [254640.440105] [<ffffffff810141e0>] ? child_rip+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440113] INFO: task nfsd:1753 blocked for more than 120 seconds.
Jul 7 11:29:57 io kernel: [254640.440119] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jul 7 11:29:57 io kernel: [254640.440126] nfsd D 0000000000000000 0 1753 2 0x00000000
Jul 7 11:29:57 io kernel: [254640.440130] ffff88007b345b10 0000000000000046 0000000000015bc0 0000000000015bc0
Jul 7 11:29:57 io kernel: [254640.440135] ffff88007cbc4890 ffff88007b345fd8 0000000000015bc0 ffff88007cbc44d0
Jul 7 11:29:57 io kernel: [254640.440139] 0000000000015bc0 ffff88007b345fd8 0000000000015bc0 ffff88007cbc4890
Jul 7 11:29:57 io kernel: [254640.440143] Call Trace:
Jul 7 11:29:57 io kernel: [254640.440147] [<ffffffff81219ce1>] start_this_handle+0x251/0x4b0
Jul 7 11:29:57 io kernel: [254640.440150] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40
Jul 7 11:29:57 io kernel: [254640.440154] [<ffffffff81559cde>] ? _spin_lock+0xe/0x20
Jul 7 11:29:57 io kernel: [254640.440158] [<ffffffff8121a115>] jbd2_journal_start+0xb5/0x100
Jul 7 11:29:57 io kernel: [254640.440162] [<ffffffff811f80b8>] ext4_journal_start_sb+0x58/0x90
Jul 7 11:29:57 io kernel: [254640.440167] [<ffffffff811deb9a>] ext4_dirty_inode+0x2a/0x60
Jul 7 11:29:57 io kernel: [254640.440171] [<ffffffff81166f12>] __mark_inode_dirty+0x42/0x1e0
Jul 7 11:29:57 io kernel: [254640.440174] [<ffffffff8115d29c>] inode_setattr+0x7c/0x170
Jul 7 11:29:57 io kernel: [254640.440178] [<ffffffff811ded56>] ext4_setattr+0x186/0x370
Jul 7 11:29:57 io kernel: [254640.440181] [<ffffffff8115d4fb>] notify_change+0x16b/0x350
Jul 7 11:29:57 io kernel: [254640.440196] [<ffffffffa031d440>] nfsd_setattr+0x330/0x460 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440205] [<ffffffffa0327a26>] nfsd3_proc_setattr+0x76/0xc0 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440213] [<ffffffffa031844e>] nfsd_dispatch+0xfe/0x250 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440230] [<ffffffffa0129664>] svc_process_common+0x344/0x610 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440235] [<ffffffff8105b210>] ? default_wake_function+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440247] [<ffffffffa0129a40>] svc_process+0x110/0x150 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440254] [<ffffffffa0318af5>] nfsd+0xc5/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440261] [<ffffffffa0318a30>] ? nfsd+0x0/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440264] [<ffffffff81084d16>] kthread+0x96/0xa0
Jul 7 11:29:57 io kernel: [254640.440268] [<ffffffff810141ea>] child_rip+0xa/0x20
Jul 7 11:29:57 io kernel: [254640.440271] [<ffffffff81084c80>] ? kthread+0x0/0xa0
Jul 7 11:29:57 io kernel: [254640.440274] [<ffffffff810141e0>] ? child_rip+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440277] INFO: task nfsd:1755 blocked for more than 120 seconds.
Jul 7 11:29:57 io kernel: [254640.440283] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jul 7 11:29:57 io kernel: [254640.440290] nfsd D 0000000000000003 0 1755 2 0x00000000
Jul 7 11:29:57 io kernel: [254640.440294] ffff8800365ffb90 0000000000000046 0000000000015bc0 0000000000015bc0
Jul 7 11:29:57 io kernel: [254640.440298] ffff88007ade03c0 ffff8800365fffd8 0000000000015bc0 ffff88007ade0000
Jul 7 11:29:57 io kernel: [254640.440302] 0000000000015bc0 ffff8800365fffd8 0000000000015bc0 ffff88007ade03c0
Jul 7 11:29:57 io kernel: [254640.440307] Call Trace:
Jul 7 11:29:57 io kernel: [254640.440310] [<ffffffff81219ce1>] start_this_handle+0x251/0x4b0
Jul 7 11:29:57 io kernel: [254640.440314] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40
Jul 7 11:29:57 io kernel: [254640.440318] [<ffffffff8121a115>] jbd2_journal_start+0xb5/0x100
Jul 7 11:29:57 io kernel: [254640.440321] [<ffffffff811f80b8>] ext4_journal_start_sb+0x58/0x90
Jul 7 11:29:57 io kernel: [254640.440325] [<ffffffff811dedf0>] ext4_setattr+0x220/0x370
Jul 7 11:29:57 io kernel: [254640.440328] [<ffffffff8115d4fb>] notify_change+0x16b/0x350
Jul 7 11:29:57 io kernel: [254640.440337] [<ffffffffa031d440>] nfsd_setattr+0x330/0x460 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440345] [<ffffffffa0327a26>] nfsd3_proc_setattr+0x76/0xc0 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440353] [<ffffffffa031844e>] nfsd_dispatch+0xfe/0x250 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440364] [<ffffffffa0129664>] svc_process_common+0x344/0x610 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440369] [<ffffffff8105b210>] ? default_wake_function+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440380] [<ffffffffa0129a40>] svc_process+0x110/0x150 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440387] [<ffffffffa0318af5>] nfsd+0xc5/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440394] [<ffffffffa0318a30>] ? nfsd+0x0/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440398] [<ffffffff81084d16>] kthread+0x96/0xa0
Jul 7 11:29:57 io kernel: [254640.440401] [<ffffffff810141ea>] child_rip+0xa/0x20
Jul 7 11:29:57 io kernel: [254640.440404] [<ffffffff81084c80>] ? kthread+0x0/0xa0
Jul 7 11:29:57 io kernel: [254640.440407] [<ffffffff810141e0>] ? child_rip+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440410] INFO: task nfsd:1757 blocked for more than 120 seconds.
Jul 7 11:29:57 io kernel: [254640.440416] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jul 7 11:29:57 io kernel: [254640.440423] nfsd D 0000000000000002 0 1757 2 0x00000000
Jul 7 11:29:57 io kernel: [254640.440427] ffff880036b03b10 0000000000000046 0000000000015bc0 0000000000015bc0
Jul 7 11:29:57 io kernel: [254640.440431] ffff88007b254890 ffff880036b03fd8 0000000000015bc0 ffff88007b2544d0
Jul 7 11:29:57 io kernel: [254640.440435] 0000000000015bc0 ffff880036b03fd8 0000000000015bc0 ffff88007b254890
Jul 7 11:29:57 io kernel: [254640.440439] Call Trace:
Jul 7 11:29:57 io kernel: [254640.440443] [<ffffffff81219ce1>] start_this_handle+0x251/0x4b0
Jul 7 11:29:57 io kernel: [254640.440447] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40
Jul 7 11:29:57 io kernel: [254640.440451] [<ffffffff8121a115>] jbd2_journal_start+0xb5/0x100
Jul 7 11:29:57 io kernel: [254640.440455] [<ffffffff8127e8e1>] ? aa_alloc_task_context+0x31/0xa0
Jul 7 11:29:57 io kernel: [254640.440459] [<ffffffff811f80b8>] ext4_journal_start_sb+0x58/0x90
Jul 7 11:29:57 io kernel: [254640.440463] [<ffffffff811deb9a>] ext4_dirty_inode+0x2a/0x60
Jul 7 11:29:57 io kernel: [254640.440466] [<ffffffff81166f12>] __mark_inode_dirty+0x42/0x1e0
Jul 7 11:29:57 io kernel: [254640.440469] [<ffffffff8115d29c>] inode_setattr+0x7c/0x170
Jul 7 11:29:57 io kernel: [254640.440473] [<ffffffff811ded56>] ext4_setattr+0x186/0x370
Jul 7 11:29:57 io kernel: [254640.440476] [<ffffffff8115d4fb>] notify_change+0x16b/0x350
Jul 7 11:29:57 io kernel: [254640.440484] [<ffffffffa031d440>] nfsd_setattr+0x330/0x460 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440493] [<ffffffffa0327a26>] nfsd3_proc_setattr+0x76/0xc0 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440500] [<ffffffffa031844e>] nfsd_dispatch+0xfe/0x250 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440512] [<ffffffffa0129664>] svc_process_common+0x344/0x610 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440516] [<ffffffff8105b210>] ? default_wake_function+0x0/0x20
Jul 7 11:29:57 io kernel: [254640.440528] [<ffffffffa0129a40>] svc_process+0x110/0x150 [sunrpc]
Jul 7 11:29:57 io kernel: [254640.440535] [<ffffffffa0318af5>] nfsd+0xc5/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440542] [<ffffffffa0318a30>] ? nfsd+0x0/0x170 [nfsd]
Jul 7 11:29:57 io kernel: [254640.440545] [<ffffffff81084d16>] kthread+0x96/0xa0
Jul 7 11:29:57 io kernel: [254640.440549] [<ffffffff810141ea>] child_rip+0xa/0x20
Jul 7 11:29:57 io kernel: [254640.440552] [<ffffffff81084c80>] ? kthread+0x0/0xa0
Jul 7 11:29:57 io kernel: [254640.440555] [<ffffffff810141e0>] ? child_rip+0x0/0x20

dmesg attached