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[Linux-cluster] gfs2 blocking tasks



Hi,

I have a 3-node cluster in testing which seem to work quite well ( cman, rgmanager, gfs2, etc ). On (only) one of my nodes, yesterday i noticed the message below in dmesg.

I saw this 30 minutes after the facts. I could browse both my gfs2 mounts, there was no fencing or anything on any node.

Any idea what might have caused this, and then go away?

Aug 19 00:10:01 vm02-test kernel: [282120.240067] INFO: task kworker/1:0:3117 blocked for more than 120 seconds. Aug 19 00:10:01 vm02-test kernel: [282120.240182] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 19 00:10:01 vm02-test kernel: [282120.240296] kworker/1:0 D ffff88032fc93900 0 3117 2 0x00000000 Aug 19 00:10:01 vm02-test kernel: [282120.240302] ffff8802bb4dfb30 0000000000000046 ffff88031e4744d0 ffff8802bb4dffd8 Aug 19 00:10:01 vm02-test kernel: [282120.240307] ffff8802bb4dffd8 ffff8802bb4dffd8 ffff88031e5796f0 ffff88031e4744d0 Aug 19 00:10:01 vm02-test kernel: [282120.240311] 0000000000000286 ffff88032ffbd0f8 ffff8802bb4dfbc8 0000000000000002
Aug 19 00:10:01 vm02-test kernel: [282120.240316] Call Trace:
Aug 19 00:10:01 vm02-test kernel: [282120.240334] [<ffffffffa0570290>] ? gfs2_glock_demote_wait+0x20/0x20 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240340] [<ffffffff81666c89>] schedule+0x29/0x70 Aug 19 00:10:01 vm02-test kernel: [282120.240349] [<ffffffffa057029e>] gfs2_glock_holder_wait+0xe/0x20 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240352] [<ffffffff81665400>] __wait_on_bit+0x60/0x90 Aug 19 00:10:01 vm02-test kernel: [282120.240361] [<ffffffffa0570290>] ? gfs2_glock_demote_wait+0x20/0x20 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240364] [<ffffffff816654ac>] out_of_line_wait_on_bit+0x7c/0x90 Aug 19 00:10:01 vm02-test kernel: [282120.240369] [<ffffffff81073400>] ? autoremove_wake_function+0x40/0x40 Aug 19 00:10:01 vm02-test kernel: [282120.240378] [<ffffffffa05713a7>] wait_on_holder+0x47/0x80 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240388] [<ffffffffa05741d8>] gfs2_glock_nq+0x328/0x450 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240399] [<ffffffffa058a8ca>] gfs2_check_blk_type+0x4a/0x150 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240410] [<ffffffffa058a8c1>] ? gfs2_check_blk_type+0x41/0x150 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240421] [<ffffffffa058ba0c>] gfs2_evict_inode+0x2cc/0x360 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240432] [<ffffffffa058b842>] ? gfs2_evict_inode+0x102/0x360 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240437] [<ffffffff811940c2>] evict+0xb2/0x1b0 Aug 19 00:10:01 vm02-test kernel: [282120.240440] [<ffffffff811942c9>] iput+0x109/0x210 Aug 19 00:10:01 vm02-test kernel: [282120.240448] [<ffffffffa0572fdc>] delete_work_func+0x5c/0x90 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240453] [<ffffffff8106d5fa>] process_one_work+0x12a/0x420 Aug 19 00:10:01 vm02-test kernel: [282120.240462] [<ffffffffa0572f80>] ? gfs2_holder_uninit+0x40/0x40 [gfs2] Aug 19 00:10:01 vm02-test kernel: [282120.240465] [<ffffffff8106e19e>] worker_thread+0x12e/0x2f0 Aug 19 00:10:01 vm02-test kernel: [282120.240469] [<ffffffff8106e070>] ? manage_workers.isra.25+0x200/0x200 Aug 19 00:10:01 vm02-test kernel: [282120.240472] [<ffffffff81072e73>] kthread+0x93/0xa0 Aug 19 00:10:01 vm02-test kernel: [282120.240477] [<ffffffff816710a4>] kernel_thread_helper+0x4/0x10 Aug 19 00:10:01 vm02-test kernel: [282120.240480] [<ffffffff81072de0>] ? flush_kthread_worker+0x80/0x80 Aug 19 00:10:01 vm02-test kernel: [282120.240484] [<ffffffff816710a0>] ? gs_change+0x13/0x13 Aug 19 00:12:01 vm02-test kernel: [282240.240061] INFO: task kworker/1:0:3117 blocked for more than 120 seconds. Aug 19 00:12:01 vm02-test kernel: [282240.240175] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 19 00:12:01 vm02-test kernel: [282240.240289] kworker/1:0 D ffff88032fc93900 0 3117 2 0x00000000 Aug 19 00:12:01 vm02-test kernel: [282240.240294] ffff8802bb4dfb30 0000000000000046 ffff88031e4744d0 ffff8802bb4dffd8 Aug 19 00:12:01 vm02-test kernel: [282240.240299] ffff8802bb4dffd8 ffff8802bb4dffd8 ffff88031e5796f0 ffff88031e4744d0 Aug 19 00:12:01 vm02-test kernel: [282240.240304] 0000000000000286 ffff88032ffbd0f8 ffff8802bb4dfbc8 0000000000000002
Aug 19 00:12:01 vm02-test kernel: [282240.240309] Call Trace:
Aug 19 00:12:01 vm02-test kernel: [282240.240326] [<ffffffffa0570290>] ? gfs2_glock_demote_wait+0x20/0x20 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240332] [<ffffffff81666c89>] schedule+0x29/0x70 Aug 19 00:12:01 vm02-test kernel: [282240.240341] [<ffffffffa057029e>] gfs2_glock_holder_wait+0xe/0x20 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240345] [<ffffffff81665400>] __wait_on_bit+0x60/0x90 Aug 19 00:12:01 vm02-test kernel: [282240.240353] [<ffffffffa0570290>] ? gfs2_glock_demote_wait+0x20/0x20 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240357] [<ffffffff816654ac>] out_of_line_wait_on_bit+0x7c/0x90 Aug 19 00:12:01 vm02-test kernel: [282240.240362] [<ffffffff81073400>] ? autoremove_wake_function+0x40/0x40 Aug 19 00:12:01 vm02-test kernel: [282240.240371] [<ffffffffa05713a7>] wait_on_holder+0x47/0x80 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240380] [<ffffffffa05741d8>] gfs2_glock_nq+0x328/0x450 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240391] [<ffffffffa058a8ca>] gfs2_check_blk_type+0x4a/0x150 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240402] [<ffffffffa058a8c1>] ? gfs2_check_blk_type+0x41/0x150 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240413] [<ffffffffa058ba0c>] gfs2_evict_inode+0x2cc/0x360 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240424] [<ffffffffa058b842>] ? gfs2_evict_inode+0x102/0x360 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240429] [<ffffffff811940c2>] evict+0xb2/0x1b0 Aug 19 00:12:01 vm02-test kernel: [282240.240432] [<ffffffff811942c9>] iput+0x109/0x210 Aug 19 00:12:01 vm02-test kernel: [282240.240440] [<ffffffffa0572fdc>] delete_work_func+0x5c/0x90 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240445] [<ffffffff8106d5fa>] process_one_work+0x12a/0x420 Aug 19 00:12:01 vm02-test kernel: [282240.240454] [<ffffffffa0572f80>] ? gfs2_holder_uninit+0x40/0x40 [gfs2] Aug 19 00:12:01 vm02-test kernel: [282240.240458] [<ffffffff8106e19e>] worker_thread+0x12e/0x2f0 Aug 19 00:12:01 vm02-test kernel: [282240.240462] [<ffffffff8106e070>] ? manage_workers.isra.25+0x200/0x200 Aug 19 00:12:01 vm02-test kernel: [282240.240465] [<ffffffff81072e73>] kthread+0x93/0xa0 Aug 19 00:12:01 vm02-test kernel: [282240.240469] [<ffffffff816710a4>] kernel_thread_helper+0x4/0x10 Aug 19 00:12:01 vm02-test kernel: [282240.240473] [<ffffffff81072de0>] ? flush_kthread_worker+0x80/0x80 Aug 19 00:12:01 vm02-test kernel: [282240.240476] [<ffffffff816710a0>] ? gs_change+0x13/0x13
<snip, goes on for a while>

Kind regards,

Bart


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