Looks like we need to take time to clean up device_list_mutex,
chunk_mutex, volume_mutex and rcu. As of now I have sent out,
[PATCH] btrfs: fix a possible umount deadlock
This has passed xfstests/btrfs.
Thanks, Anand
On 09/09/2016 08:38 AM, Anand Jain wrote:
Thanks for the report
Thanks for the report Ilya.
Yep. Have seen similar issues during hotspare fixes as well.
Where the vfs call to btrfs_show_devname() and its
device_list_mutex lock is conflicting. One of that is fixed
here.
--
779bf3fefa835cb52a07457c8acac6f2f66f2493
btrfs: fix lock dep warning, move
Hello,
This one seems to have appeared after Anand's commit
142388194191 ("btrfs: do not background blkdev_put()") got merged into
4.8-rc4.
Thanks,
Ilya
[ 983.284212] ==
[ 983.290401] [ INFO: possible circular locking
