Hi,
I was transferring some data with rsync to a btrfs filesystem when I got:
set 04 14:59:05 kernel: INFO: task kworker/u33:2:25015 blocked for more
than 120 seconds.
set 04 14:59:05 kernel: Not tainted 4.12.10-1.el7.elrepo.x86_64 #1
set 04 14:59:05 kernel: "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
set 04 14:59:05 kernel: kworker/u33:2 D 0 25015 2 0x00000080
set 04 14:59:05 kernel: Workqueue: events_unbound
btrfs_async_reclaim_metadata_space [btrfs]
set 04 14:59:05 kernel: Call Trace:
set 04 14:59:05 kernel: __schedule+0x28a/0x880
set 04 14:59:05 kernel: schedule+0x36/0x80
set 04 14:59:05 kernel: wb_wait_for_completion+0x64/0x90
set 04 14:59:05 kernel: ? remove_wait_queue+0x60/0x60
set 04 14:59:05 kernel: __writeback_inodes_sb_nr+0x8e/0xb0
set 04 14:59:05 kernel: writeback_inodes_sb_nr+0x10/0x20
set 04 14:59:05 kernel: flush_space+0x469/0x580 [btrfs]
set 04 14:59:05 kernel: ? dequeue_task_fair+0x577/0x830
set 04 14:59:05 kernel: ? pick_next_task_fair+0x122/0x550
set 04 14:59:05 kernel: btrfs_async_reclaim_metadata_space+0x112/0x430
[btrfs]
set 04 14:59:05 kernel: process_one_work+0x149/0x360
set 04 14:59:05 kernel: worker_thread+0x4d/0x3c0
set 04 14:59:05 kernel: kthread+0x109/0x140
set 04 14:59:05 kernel: ? rescuer_thread+0x380/0x380
set 04 14:59:05 kernel: ? kthread_park+0x60/0x60
set 04 14:59:05 kernel: ? do_syscall_64+0x67/0x150
set 04 14:59:05 kernel: ret_from_fork+0x25/0x30
btrfs fi df /data
Data, single: total=20.63TiB, used=20.63TiB
System, DUP: total=8.00MiB, used=2.20MiB
Metadata, DUP: total=41.50GiB, used=40.61GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
btrfs fi show /dev/sdo
Label: 'Storage' uuid: 429e42f4-dd9e-4267-b353-aa0831812f87
Total devices 1 FS bytes used 20.67TiB
devid 1 size 36.38TiB used 20.71TiB path /dev/sdo
Is it serious? Can I provide other info?
Regards,
--
Marco Crociani
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