Thanks it seems to be a problem with the discard option. I'm already talking to JBacik at linux-btrfs. You can find more info in this thread. http://www.spinics.net/lists/linux-btrfs/msg17439.html Hopefully we can solve it as discard gives me a huge improvement in ceph. Stefan Am 26.06.2012 um 00:04 schrieb Sage Weil <sage@xxxxxxxxxxx>: > Hi Stefan, > > I haven't seen this one. The async commit stuff is mine, but there > haven't been problems with it for a year or more. This is a recent > kernel, I assume? > > Can you dump the other tasks? Something is preventing the commit from > completing. > > [adding linux-btrfs to cc] > > sage > > > On Fri, 22 Jun 2012, Stefan Priebe wrote: > >> Hi, >> >> are these bugs known? >> >> [ 2157.104532] INFO: task kworker/2:2:6278 blocked for more than 120 seconds. >> [ 2157.130649] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables >> this message. >> [ 2157.156750] kworker/2:2 D ffffffff8180eba0 0 6278 2 >> 0x00000000 >> [ 2157.182763] ffff880c3c0d7c90 0000000000000046 ffff880c3e2aa1c0 >> 0000000000012280 >> [ 2157.208662] ffff880c3c0d7fd8 ffff880c3c0d6010 0000000000012280 >> 0000000000012280 >> [ 2157.234591] ffff880c3c0d7fd8 0000000000012280 ffff880e78e5a240 >> ffff880c3e2aa1c0 >> [ 2157.260573] Call Trace: >> [ 2157.285872] [<ffffffff81620334>] schedule+0x24/0x70 >> [ 2157.311097] [<ffffffffa007f4e5>] wait_for_commit+0x55/0x90 [btrfs] >> [ 2157.311106] [<ffffffff81060140>] ? wake_up_bit+0x40/0x40 >> [ 2157.311129] [<ffffffffa00810b5>] btrfs_commit_transaction+0x655/0xab0 >> [btrfs] >> [ 2157.311134] [<ffffffff810736f0>] ? set_next_entity+0x90/0xa0 >> [ 2157.311138] [<ffffffff81060140>] ? wake_up_bit+0x40/0x40 >> [ 2157.311156] [<ffffffffa0081810>] ? btrfs_end_transaction+0x20/0x20 [btrfs] >> [ 2157.311171] [<ffffffffa008182a>] do_async_commit+0x1a/0x30 [btrfs] >> [ 2157.311175] [<ffffffff81058eff>] process_one_work+0x11f/0x470 >> [ 2157.311179] [<ffffffff8105b128>] worker_thread+0x178/0x400 >> [ 2157.311182] [<ffffffff8105afb0>] ? manage_workers+0x210/0x210 >> [ 2157.311185] [<ffffffff8105fc46>] kthread+0x96/0xa0 >> [ 2157.311190] [<ffffffff81622dd4>] kernel_thread_helper+0x4/0x10 >> [ 2157.311195] [<ffffffff8105fbb0>] ? kthread_worker_fn+0x130/0x130 >> [ 2157.311198] [<ffffffff81622dd0>] ? gs_change+0xb/0xb >> [ 2157.311220] INFO: task ceph-osd:14426 blocked for more than 120 seconds. >> [ 2157.311220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables >> this message. >> [ 2157.311224] ceph-osd D 0000000000000002 0 14426 1 >> 0x00000000 >> [ 2157.311228] ffff880ae8c33c38 0000000000000082 ffff880a39142180 >> 0000000000012280 >> [ 2157.311231] ffff880ae8c33fd8 ffff880ae8c32010 0000000000012280 >> 0000000000012280 >> [ 2157.311234] ffff880ae8c33fd8 0000000000012280 ffff880983efa1c0 >> ffff880a39142180 >> [ 2157.311235] Call Trace: >> [ 2157.311240] [<ffffffff81620334>] schedule+0x24/0x70 >> [ 2157.311256] [<ffffffffa0081d85>] >> btrfs_commit_transaction_async+0x1d5/0x240 [btrfs] >> [ 2157.311271] [<ffffffffa0065eb6>] ? block_rsv_add_bytes+0x26/0x60 [btrfs] >> [ 2157.311275] [<ffffffff81060140>] ? wake_up_bit+0x40/0x40 >> [ 2157.311289] [<ffffffffa0065f25>] ? block_rsv_migrate_bytes+0x35/0x50 >> [btrfs] >> [ 2157.311311] [<ffffffffa00b2d5e>] btrfs_mksubvol+0x2be/0x350 [btrfs] >> [ 2157.311329] [<ffffffffa00b2ef9>] >> btrfs_ioctl_snap_create_transid+0x109/0x1a0 [btrfs] >> [ 2157.311346] [<ffffffffa00b4bf4>] btrfs_ioctl_snap_create_v2+0x84/0xf0 >> [btrfs] >> [ 2157.311363] [<ffffffffa00b756f>] btrfs_ioctl+0x76f/0x12d0 [btrfs] >> [ 2157.311368] [<ffffffff8114459a>] ? fsnotify+0x1ba/0x2e0 >> [ 2157.311372] [<ffffffff8111ade3>] do_vfs_ioctl+0x93/0x4f0 >> [ 2157.311375] [<ffffffff8111b28a>] sys_ioctl+0x4a/0x80 >> [ 2157.311379] [<ffffffff81621ba2>] system_call_fastpath+0x16/0x1b >> >> Stefan >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
