linux-kernel - Re: LTP zram tests triggers might_sleep splat - bisects to 0a9a25ca7843 ("block: let blkcg

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Date:   Mon, 28 Mar 2022 12:45:55 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Mike Galbraith <efault@....de>
Cc:     LKML <linux-kernel@...r.kernel.org>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@....de>
Subject: Re: LTP zram tests triggers might_sleep splat - bisects to
 0a9a25ca7843 ("block: let blkcg_gq grab request queue's refcnt")

On Mon, Mar 28, 2022 at 06:21:51AM +0200, Mike Galbraith wrote:
> Splat bisected cleanly, verified with a revert afterward.
> 
> (note: "Preemption disabled at:" address tracking looked to be pretty
> broken during bisection, so...)

It can be fixed by:

https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-5.18/block&id=d578c770c85233af592e54537f93f3831bde7e9a


Thanks,
Ming