it seems that I have the same problem with my lucid machines
System: ubuntu lucid (10.04)
service NFSv4
The client hangs, the load is going very high, the machine needs a reboot
client kern.log:
Nov 26 13:32:36 frankie kernel: [46080.421384] INFO: task indicator-apple:21017
blocked for more than 120 seconds.
Nov 26 13:32:36 frankie kernel: [46080.421393] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 26 13:32:36 frankie kernel: [46080.421399] indicator-app D 0000000000000001
0 21017 1 0x00000008
Nov 26 13:32:36 frankie kernel: [46080.421409] ffff88007ce858e8
0000000000000086 0000000000015bc0 0000000000015bc0
Nov 26 13:32:36 frankie kernel: [46080.421418] ffff88008bb21a98
ffff88007ce85fd8 0000000000015bc0 ffff88008bb216e0
Nov 26 13:32:36 frankie kernel: [46080.421458] 0000000000015bc0
ffff88007ce85fd8 0000000000015bc0 ffff88008bb21a98
Nov 26 13:32:36 frankie kernel: [46080.421467] Call Trace:
Nov 26 13:32:36 frankie kernel: [46080.421519] [<ffffffffa0e804c0>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421533] [<ffffffff81541bc7>]
io_schedule+0x47/0x70
Nov 26 13:32:36 frankie kernel: [46080.421557] [<ffffffffa0e804ce>]
nfs_wait_bit_uninterruptible+0xe/0x20 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421565] [<ffffffff8154242f>]
__wait_on_bit+0x5f/0x90
Nov 26 13:32:36 frankie kernel: [46080.421592] [<ffffffffa0e804c0>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421600] [<ffffffff815424d8>]
out_of_line_wait_on_bit+0x78/0x90
Nov 26 13:32:36 frankie kernel: [46080.421610] [<ffffffff810845b0>] ?
wake_bit_function+0x0/0x40
Nov 26 13:32:36 frankie kernel: [46080.421633] [<ffffffffa0e804af>]
nfs_wait_on_request+0x2f/0x40 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421657] [<ffffffffa0e86226>]
nfs_try_to_update_request+0xb6/0x160 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421680] [<ffffffffa0e8630d>]
nfs_writepage_setup+0x3d/0x1e0 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421704] [<ffffffffa0e86544>]
nfs_updatepage+0x94/0x1a0 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421726] [<ffffffffa0e804f9>] ?
nfs_release_request+0x19/0x20 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421751] [<ffffffffa0e75eaa>]
nfs_write_end+0x5a/0x2c0 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421760] [<ffffffff810f3262>] ?
iov_iter_copy_from_user_atomic+0x92/0x130
Nov 26 13:32:36 frankie kernel: [46080.421768] [<ffffffff810f3422>]
generic_perform_write+0x122/0x1d0
Nov 26 13:32:36 frankie kernel: [46080.421777] [<ffffffff81061f98>] ?
check_preempt_wakeup+0x2b8/0x3c0
Nov 26 13:32:36 frankie kernel: [46080.421786] [<ffffffff810f4553>]
generic_file_buffered_write+0x73/0xd0
Nov 26 13:32:36 frankie kernel: [46080.421796] [<ffffffff810583a1>] ?
balance_tasks+0x111/0x160
Nov 26 13:32:36 frankie kernel: [46080.421804] [<ffffffff810f5b00>]
__generic_file_aio_write+0x240/0x470
Nov 26 13:32:36 frankie kernel: [46080.421811] [<ffffffff810584ed>] ?
load_balance_fair+0xfd/0x140
Nov 26 13:32:36 frankie kernel: [46080.421819] [<ffffffff8105fb60>] ?
load_balance_start_fair+0x0/0x80
Nov 26 13:32:36 frankie kernel: [46080.421826] [<ffffffff810f5d9f>]
generic_file_aio_write+0x6f/0xe0
Nov 26 13:32:36 frankie kernel: [46080.421834] [<ffffffff812b8906>] ?
rb_erase+0xd6/0x160
Nov 26 13:32:36 frankie kernel: [46080.421842] [<ffffffff81052890>] ?
__dequeue_entity+0x30/0x50
Nov 26 13:32:36 frankie kernel: [46080.421862] [<ffffffffa0e75a0a>]
nfs_file_write+0xda/0x1e0 [nfs]
Nov 26 13:32:36 frankie kernel: [46080.421874] [<ffffffff81062198>] ?
pick_next_task_fair+0xf8/0x140
Nov 26 13:32:36 frankie kernel: [46080.421885] [<ffffffff81142f7a>]
do_sync_write+0xfa/0x140
Nov 26 13:32:36 frankie kernel: [46080.421892] [<ffffffff81084570>] ?
autoremove_wake_function+0x0/0x40
Nov 26 13:32:36 frankie kernel: [46080.421900] [<ffffffff8154800c>] ?
kprobe_flush_task+0xbc/0xe0
Nov 26 13:32:36 frankie kernel: [46080.421911] [<ffffffff81252446>] ?
security_file_permission+0x16/0x20
Nov 26 13:32:36 frankie kernel: [46080.421918] [<ffffffff81143278>]
vfs_write+0xb8/0x1a0
Nov 26 13:32:36 frankie kernel: [46080.421926] [<ffffffff81143b11>]
sys_write+0x51/0x80
Nov 26 13:32:36 frankie kernel: [46080.421936] [<ffffffff810121b2>]
system_call_fastpath+0x16/0x1b
Nov 26 13:34:36 frankie kernel: [46200.421362] INFO: task indicator-apple:21017
blocked for more than 120 seconds.
Nov 26 13:34:36 frankie kernel: [46200.421371] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 26 13:34:36 frankie kernel: [46200.421377] indicator-app D 0000000000000001
0 21017 1 0x00000008
Nov 26 13:34:36 frankie kernel: [46200.421388] ffff88007ce858e8
0000000000000086 0000000000015bc0 0000000000015bc0
Nov 26 13:34:36 frankie kernel: [46200.421397] ffff88008bb21a98
ffff88007ce85fd8 0000000000015bc0 ffff88008bb216e0
Nov 26 13:34:36 frankie kernel: [46200.421405] 0000000000015bc0
ffff88007ce85fd8 0000000000015bc0 ffff88008bb21a98
Nov 26 13:34:36 frankie kernel: [46200.421413] Call Trace:
Nov 26 13:34:36 frankie kernel: [46200.421512] [<ffffffffa0e804c0>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421526] [<ffffffff81541bc7>]
io_schedule+0x47/0x70
Nov 26 13:34:36 frankie kernel: [46200.421550] [<ffffffffa0e804ce>]
nfs_wait_bit_uninterruptible+0xe/0x20 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421558] [<ffffffff8154242f>]
__wait_on_bit+0x5f/0x90
Nov 26 13:34:36 frankie kernel: [46200.421586] [<ffffffffa0e804c0>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421595] [<ffffffff815424d8>]
out_of_line_wait_on_bit+0x78/0x90
Nov 26 13:34:36 frankie kernel: [46200.421604] [<ffffffff810845b0>] ?
wake_bit_function+0x0/0x40
Nov 26 13:34:36 frankie kernel: [46200.421627] [<ffffffffa0e804af>]
nfs_wait_on_request+0x2f/0x40 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421651] [<ffffffffa0e86226>]
nfs_try_to_update_request+0xb6/0x160 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421676] [<ffffffffa0e8630d>]
nfs_writepage_setup+0x3d/0x1e0 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421699] [<ffffffffa0e86544>]
nfs_updatepage+0x94/0x1a0 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421723] [<ffffffffa0e804f9>] ?
nfs_release_request+0x19/0x20 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421744] [<ffffffffa0e75eaa>]
nfs_write_end+0x5a/0x2c0 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421754] [<ffffffff810f3262>] ?
iov_iter_copy_from_user_atomic+0x92/0x130
Nov 26 13:34:36 frankie kernel: [46200.421761] [<ffffffff810f3422>]
generic_perform_write+0x122/0x1d0
Nov 26 13:34:36 frankie kernel: [46200.421769] [<ffffffff81061f98>] ?
check_preempt_wakeup+0x2b8/0x3c0
Nov 26 13:34:36 frankie kernel: [46200.421779] [<ffffffff810f4553>]
generic_file_buffered_write+0x73/0xd0
Nov 26 13:34:36 frankie kernel: [46200.421788] [<ffffffff810583a1>] ?
balance_tasks+0x111/0x160
Nov 26 13:34:36 frankie kernel: [46200.421797] [<ffffffff810f5b00>]
__generic_file_aio_write+0x240/0x470
Nov 26 13:34:36 frankie kernel: [46200.421805] [<ffffffff810584ed>] ?
load_balance_fair+0xfd/0x140
Nov 26 13:34:36 frankie kernel: [46200.421812] [<ffffffff8105fb60>] ?
load_balance_start_fair+0x0/0x80
Nov 26 13:34:36 frankie kernel: [46200.421819] [<ffffffff810f5d9f>]
generic_file_aio_write+0x6f/0xe0
Nov 26 13:34:36 frankie kernel: [46200.421827] [<ffffffff812b8906>] ?
rb_erase+0xd6/0x160
Nov 26 13:34:36 frankie kernel: [46200.421835] [<ffffffff81052890>] ?
__dequeue_entity+0x30/0x50
Nov 26 13:34:36 frankie kernel: [46200.421854] [<ffffffffa0e75a0a>]
nfs_file_write+0xda/0x1e0 [nfs]
Nov 26 13:34:36 frankie kernel: [46200.421864] [<ffffffff81062198>] ?
pick_next_task_fair+0xf8/0x140
Nov 26 13:34:36 frankie kernel: [46200.421874] [<ffffffff81142f7a>]
do_sync_write+0xfa/0x140
Nov 26 13:34:36 frankie kernel: [46200.421881] [<ffffffff81084570>] ?
autoremove_wake_function+0x0/0x40
Nov 26 13:34:36 frankie kernel: [46200.421890] [<ffffffff8154800c>] ?
kprobe_flush_task+0xbc/0xe0
Nov 26 13:34:36 frankie kernel: [46200.421901] [<ffffffff81252446>] ?
security_file_permission+0x16/0x20
Nov 26 13:34:36 frankie kernel: [46200.421909] [<ffffffff81143278>]
vfs_write+0xb8/0x1a0
Nov 26 13:34:36 frankie kernel: [46200.421916] [<ffffffff81143b11>]
sys_write+0x51/0x80
Nov 26 13:34:36 frankie kernel: [46200.421926] [<ffffffff810121b2>]
system_call_fastpath+0x16/0x1b
...
or
Nov 25 04:05:36 nostromo kernel: [582361.882593] INFO: task firefox-bin:30446
blocked for more than 120 seconds.
Nov 25 04:05:36 nostromo kernel: [582361.882597] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 25 04:05:36 nostromo kernel: [582361.882600] firefox-bin D
0000000000000000 0 30446 30442 0x00000000
Nov 25 04:05:36 nostromo kernel: [582361.882606] ffff88019ed1f8e8
0000000000000082 0000000000015bc0 0000000000015bc0
Nov 25 04:05:36 nostromo kernel: [582361.882611] ffff88022fd05f80
ffff88019ed1ffd8 0000000000015bc0 ffff88022fd05bc0
Nov 25 04:05:36 nostromo kernel: [582361.882615] 0000000000015bc0
ffff88019ed1ffd8 0000000000015bc0 ffff88022fd05f80
Nov 25 04:05:36 nostromo kernel: [582361.882619] Call Trace:
Nov 25 04:05:36 nostromo kernel: [582361.882643] [<ffffffffa0204440>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882650] [<ffffffff815415e7>]
io_schedule+0x47/0x70
Nov 25 04:05:36 nostromo kernel: [582361.882661] [<ffffffffa020444e>]
nfs_wait_bit_uninterruptible+0xe/0x20 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882665] [<ffffffff81541e4f>]
__wait_on_bit+0x5f/0x90
Nov 25 04:05:36 nostromo kernel: [582361.882676] [<ffffffffa0204440>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882680] [<ffffffff81541ef8>]
out_of_line_wait_on_bit+0x78/0x90
Nov 25 04:05:36 nostromo kernel: [582361.882685] [<ffffffff810845c0>] ?
wake_bit_function+0x0/0x40
Nov 25 04:05:36 nostromo kernel: [582361.882690] [<ffffffff8108893f>] ?
hrtimer_try_to_cancel+0x3f/0xd0
Nov 25 04:05:36 nostromo kernel: [582361.882700] [<ffffffffa020442f>]
nfs_wait_on_request+0x2f/0x40 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882712] [<ffffffffa020a1a6>]
nfs_try_to_update_request+0xb6/0x160 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882717] [<ffffffff8104b8d4>] ?
scale_rt_power+0x24/0x70
Nov 25 04:05:36 nostromo kernel: [582361.882721] [<ffffffff81051af0>] ?
update_cpu_power+0x80/0xf0
Nov 25 04:05:36 nostromo kernel: [582361.882733] [<ffffffffa020a28d>]
nfs_writepage_setup+0x3d/0x1e0 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882744] [<ffffffffa020a4c4>]
nfs_updatepage+0x94/0x1a0 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882754] [<ffffffffa0204479>] ?
nfs_release_request+0x19/0x20 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882764] [<ffffffffa01f9e2a>]
nfs_write_end+0x5a/0x2c0 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882768] [<ffffffff810f3242>] ?
iov_iter_copy_from_user_atomic+0x92/0x130
Nov 25 04:05:36 nostromo kernel: [582361.882772] [<ffffffff810f3402>]
generic_perform_write+0x122/0x1d0
Nov 25 04:05:36 nostromo kernel: [582361.882776] [<ffffffff810f4533>]
generic_file_buffered_write+0x73/0xd0
Nov 25 04:05:36 nostromo kernel: [582361.882780] [<ffffffff810f5ae0>]
__generic_file_aio_write+0x240/0x470
Nov 25 04:05:36 nostromo kernel: [582361.882784] [<ffffffff81052ce8>] ?
enqueue_sleeper+0x158/0x220
Nov 25 04:05:36 nostromo kernel: [582361.882787] [<ffffffff8105da22>] ?
enqueue_entity+0x122/0x1a0
Nov 25 04:05:36 nostromo kernel: [582361.882791] [<ffffffff810f5d7f>]
generic_file_aio_write+0x6f/0xe0
Nov 25 04:05:36 nostromo kernel: [582361.882800] [<ffffffffa01f998a>]
nfs_file_write+0xda/0x1e0 [nfs]
Nov 25 04:05:36 nostromo kernel: [582361.882805] [<ffffffff81142daa>]
do_sync_write+0xfa/0x140
Nov 25 04:05:36 nostromo kernel: [582361.882809] [<ffffffff81084580>] ?
autoremove_wake_function+0x0/0x40
Nov 25 04:05:36 nostromo kernel: [582361.882814] [<ffffffff81252256>] ?
security_file_permission+0x16/0x20
Nov 25 04:05:36 nostromo kernel: [582361.882818] [<ffffffff811430a8>]
vfs_write+0xb8/0x1a0
Nov 25 04:05:36 nostromo kernel: [582361.882821] [<ffffffff81143941>]
sys_write+0x51/0x80
Nov 25 04:05:36 nostromo kernel: [582361.882826] [<ffffffff810121b2>]
system_call_fastpath+0x16/0x1b
Nov 25 04:07:36 nostromo kernel: [582481.882591] INFO: task firefox-bin:30446
blocked for more than 120 seconds.
Nov 25 04:07:36 nostromo kernel: [582481.882595] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 25 04:07:36 nostromo kernel: [582481.882598] firefox-bin D
0000000000000000 0 30446 30442 0x00000000
Nov 25 04:07:36 nostromo kernel: [582481.882603] ffff88019ed1f8e8
0000000000000082 0000000000015bc0 0000000000015bc0
Nov 25 04:07:36 nostromo kernel: [582481.882608] ffff88022fd05f80
ffff88019ed1ffd8 0000000000015bc0 ffff88022fd05bc0
Nov 25 04:07:36 nostromo kernel: [582481.882612] 0000000000015bc0
ffff88019ed1ffd8 0000000000015bc0 ffff88022fd05f80
Nov 25 04:07:36 nostromo kernel: [582481.882617] Call Trace:
Nov 25 04:07:36 nostromo kernel: [582481.882642] [<ffffffffa0204440>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882649] [<ffffffff815415e7>]
io_schedule+0x47/0x70
Nov 25 04:07:36 nostromo kernel: [582481.882659] [<ffffffffa020444e>]
nfs_wait_bit_uninterruptible+0xe/0x20 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882664] [<ffffffff81541e4f>]
__wait_on_bit+0x5f/0x90
Nov 25 04:07:36 nostromo kernel: [582481.882674] [<ffffffffa0204440>] ?
nfs_wait_bit_uninterruptible+0x0/0x20 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882678] [<ffffffff81541ef8>]
out_of_line_wait_on_bit+0x78/0x90
Nov 25 04:07:36 nostromo kernel: [582481.882684] [<ffffffff810845c0>] ?
wake_bit_function+0x0/0x40
Nov 25 04:07:36 nostromo kernel: [582481.882688] [<ffffffff8108893f>] ?
hrtimer_try_to_cancel+0x3f/0xd0
Nov 25 04:07:36 nostromo kernel: [582481.882699] [<ffffffffa020442f>]
nfs_wait_on_request+0x2f/0x40 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882711] [<ffffffffa020a1a6>]
nfs_try_to_update_request+0xb6/0x160 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882716] [<ffffffff8104b8d4>] ?
scale_rt_power+0x24/0x70
Nov 25 04:07:36 nostromo kernel: [582481.882720] [<ffffffff81051af0>] ?
update_cpu_power+0x80/0xf0
Nov 25 04:07:36 nostromo kernel: [582481.882731] [<ffffffffa020a28d>]
nfs_writepage_setup+0x3d/0x1e0 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882743] [<ffffffffa020a4c4>]
nfs_updatepage+0x94/0x1a0 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882753] [<ffffffffa0204479>] ?
nfs_release_request+0x19/0x20 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882762] [<ffffffffa01f9e2a>]
nfs_write_end+0x5a/0x2c0 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882767] [<ffffffff810f3242>] ?
iov_iter_copy_from_user_atomic+0x92/0x130
Nov 25 04:07:36 nostromo kernel: [582481.882771] [<ffffffff810f3402>]
generic_perform_write+0x122/0x1d0
Nov 25 04:07:36 nostromo kernel: [582481.882775] [<ffffffff810f4533>]
generic_file_buffered_write+0x73/0xd0
Nov 25 04:07:36 nostromo kernel: [582481.882779] [<ffffffff810f5ae0>]
__generic_file_aio_write+0x240/0x470
Nov 25 04:07:36 nostromo kernel: [582481.882782] [<ffffffff81052ce8>] ?
enqueue_sleeper+0x158/0x220
Nov 25 04:07:36 nostromo kernel: [582481.882786] [<ffffffff8105da22>] ?
enqueue_entity+0x122/0x1a0
Nov 25 04:07:36 nostromo kernel: [582481.882789] [<ffffffff810f5d7f>]
generic_file_aio_write+0x6f/0xe0
Nov 25 04:07:36 nostromo kernel: [582481.882799] [<ffffffffa01f998a>]
nfs_file_write+0xda/0x1e0 [nfs]
Nov 25 04:07:36 nostromo kernel: [582481.882803] [<ffffffff81142daa>]
do_sync_write+0xfa/0x140
Nov 25 04:07:36 nostromo kernel: [582481.882807] [<ffffffff81084580>] ?
autoremove_wake_function+0x0/0x40
Nov 25 04:07:36 nostromo kernel: [582481.882813] [<ffffffff81252256>] ?
security_file_permission+0x16/0x20
Nov 25 04:07:36 nostromo kernel: [582481.882816] [<ffffffff811430a8>]
vfs_write+0xb8/0x1a0
Nov 25 04:07:36 nostromo kernel: [582481.882820] [<ffffffff81143941>]
sys_write+0x51/0x80
Nov 25 04:07:36 nostromo kernel: [582481.882825] [<ffffffff810121b2>]
system_call_fastpath+0x16/0x1b
--
Overload the server ... __mutex_lock_slowpath
https://bugs.launchpad.net/bugs/658131
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