On Fri, 2018-08-24 at 15:12 +0800, jianchao.wang wrote:
> So this issue should not related with io scheduler.

Hi, I can't localize the specific issue and have changed the subject to blk-mq.

> Would you please share the entire dmesg log or backtrace you got on 4.18.3 ?

Have you been able to reproduce this? I reproduced the backtrace on a vanilla
4.18.3:
https://ibin.co/4E3q5dETqA5T.jpg

Best regards,
Massimo