Re: [REGRESSION] 6.7.1: md: raid5 hang and unresponsive system; successfully bisected

From: Song Liu <song@kernel.org>
To: Dan Moulding <dan@danm.net>
Cc: gregkh@linuxfoundation.org, junxiao.bi@oracle.com,
	 linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
	 regressions@lists.linux.dev, stable@vger.kernel.org,
	yukuai1@huaweicloud.com
Subject: Re: [REGRESSION] 6.7.1: md: raid5 hang and unresponsive system; successfully bisected
Date: Tue, 6 Feb 2024 13:34:54 -0800	[thread overview]
Message-ID: <CAPhsuW4n_=yL8PLj88x6ozFpUPmuayCiqCgtUYBQXrE70ivHbQ@mail.gmail.com> (raw)
In-Reply-To: <20240206205600.20788-1-dan@danm.net>

On Tue, Feb 6, 2024 at 12:56 PM Dan Moulding <dan@danm.net> wrote:
>
> > Dan, could you please run the test on this branch
> > (83cbdaf61b1ab9cdaa0321eeea734bc70ca069c8)?
>
> I'm sorry to report that I can still reproduce the problem running the
> kernel built from the md-6.9 branch (83cbdaf61b1a).
>
> But the only commit I see on that branch that's not in master and
> touches raid5.c is this one:
>
>     test@sysrescue:~/src/linux$ git log master..song/md-6.9 drivers/md/raid5.c
>     commit 61c90765e131e63ead773b9b99167415e246a945
>     Author: Yu Kuai <yukuai3@huawei.com>
>     Date:   Thu Dec 28 20:55:51 2023 +0800
>
>         md: remove redundant check of 'mddev->sync_thread'
>
> Is that expected, or were you expecting additional fixes to be in there?

I don't expect that commit to fix the issue. It is expected to be merged to
master in the next merge window. I am curious why I cannot reproduce
the issue. Let me try more..

Thanks,
Song