On 27 Apr 2022, at 9:27, Qian Cai wrote:

> On Tue, Apr 26, 2022 at 05:38:58PM -0400, Zi Yan wrote:
>> Thanks. Do you mind attaching your config file? I cannot reproduce
>> the deadlock locally using my own config. I also see kmemleak_scan
>> in the dumped stack, so it must be something else in addition to
>> memory online/offline causing the issue.
>
> Actually, it is one of those *offline* operations, i.e.,
>
> echo 0 > /sys/devices/system/memory/memoryNNN/online
>
> looping forever which never finish after more than 2-hour.

Thank you for the detailed information. I am able to reproduce the
issue locally. I will update the patch once I fix the bug.

--
Best Regards,
Yan, Zi