Hi,
I can now reproduce using fio:
I looked around in MariaDB issue tracker and found
https://jira.mariadb.org/browse/MDEV-26674 which lead me to
https://github.com/MariaDB/server/commit/de7db5517de11a58d57d2a41d0bc6f38b6f92dd8
-- it's a conditional based on $KV and I hit that kernel regression
during one of my bisect attempts (see
https://lore.kernel.org/all/701f3fc0-2f0c-a32c-0d41-b489a9a59b99@xxxxxxxxx/).
Setting innodb_use_native_aio=OFF will prevent the problem.
This helped me to find https://github.com/axboe/fio/issues/1195 so I now
have a working reproducer for fio.
$ cat reproducer.fio
[global]
direct=1
thread=1
norandommap=1
group_reporting=1
time_based=1
ioengine=io_uring
rw=randwrite
bs=4096
runtime=20
numjobs=1
fixedbufs=1
hipri=1
registerfiles=1
sqthread_poll=1
[filename0]
directory=/srv/machines/fio
size=200M
iodepth=1
cpus_allowed=20
...now call fio like "fio reproducer.fio". After one successful fio run,
fsfreeze will already hang for me.
--
Regards,
Thomas
