Hello Matthew,
On Fri, Aug 07, 2020 at 06:44:16PM +0100, Matthew Wilcox wrote:
>
> Everything starts going very slowly after this commit:
>
> commit 37f4a24c2469a10a4c16c641671bd766e276cf9f (refs/bisect/bad)
> Author: Ming Lei <ming.lei@xxxxxxxxxx>
> Date: Tue Jun 30 22:03:57 2020 +0800
>
> blk-mq: centralise related handling into blk_mq_get_driver_tag
Yeah, the above is one known bad commit, which is reverted in
4e2f62e566b5 ("Revert "blk-mq: put driver tag when this request is completed")
Finally the fixed patch of 'blk-mq: centralise related handling into blk_mq_get_driver_tag'
is merged as 568f27006577 ("blk-mq: centralise related handling into blk_mq_get_driver_tag").
So please test either 4e2f62e566b5 or 568f27006577 and see if there is
such issue.
Thanks,
Ming
