Hi,

When I run all xfstests on btrfs, it freeze(deadlock?)  on btrfs/232.

the output of './check.
....
btrfs/231 0s ...  0s
btrfs/232 34s ...

The os is still response.

'ls /mnt/scratch/' freeze(deadlock?) without any output.

'ps -ef' output something and then freeze. see ps.txt
we found no OOPS info in dmesg. see dmesg.txt

Any advice to gather more info for troubleshooting?
This is a server with ECC memory, and no ECC error deteced. I will keep
it for 24 hours for any info gather.

The last two patches added to btrfs code are
 From:    fdmanana@kernel.org
 Date:    Tue, 20 Apr 2021 10:55:12 +0100
 Subject: [PATCH] btrfs: fix metadata extent leak after failure to create subvolume

 From:    fdmanana@kernel.org
 Date:    Tue, 20 Apr 2021 10:55:44 +0100
 Subject: [PATCH] btrfs: fix race when picking most recent mod log operation for an old root

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2021/04/21