On Thu 23-12-21 09:02:55, yukuai (C) wrote:

在 2021/12/22 23:21, Jan Kara 写道:

quoted

On Thu 09-12-21 10:23:33, yukuai (C) wrote:

quoted

We confirmed this by our reproducer through a simple patch:
stop merging bfq_queues if their parents are different.

Can you please share your reproducer? I have prepared some patches which
I'd like to verify before posting... Thanks!

Hi,

Here is the reproducer, usually the problem will come up within an
hour.

Thanks! For some reason the reproducer does not trigger the KASAN warning
for me (with or without my patches). But anyway, I'll post my fixes and
we'll see what do people think, also I'd be grateful if you can test them
in your environment. Thanks.

								Honza
-- 
Jan Kara [off-list ref]
SUSE Labs, CR