Hi all,
I'm sorry if duplicate emails bother you. (Today I always cannot successfully
send mail to the mailing list.)
I get the following warning about s_umount isn't locked when running xfstests
btrfs/001(kernel: v4.15-rc3, mount_option: flushoncommit).
[ 400.276381] WARNING: CPU: 0 PID: 3371
We're holding the sb_start_intwrite lock at this point, and doing async
filemap_flush of the inodes will result in a deadlock if we freeze the
fs during this operation. This is because we could do a
btrfs_join_transaction() in the thread we are waiting on which would
block at sb_start_intwrite,
