linux-ext4 - Re: kernel BUG at fs/ext4/inode.c:1914

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Date:   Thu, 11 May 2023 11:21:27 +0200
From:   Marcus Hoffmann <marcus.hoffmann@...ermo.de>
To:     tytso@....edu
Cc:     famzah@...soft.com, gregkh@...uxfoundation.org, jack@...e.cz,
        linux-ext4@...r.kernel.org
Subject: Re: kernel BUG at fs/ext4/inode.c:1914 - page_buffers()

Hi,

> On Wed, Mar 15, 2023 at 18:57, Theodore Ts'o wrote:
>
> Yeah, sorry, I didn't see it since it was in an attachment as opposed
> to with an explicit [PATCH] subject line.
>
> And at this point, the data=journal writeback patches have landed in
> the ext4/dev tree, and while we could try to see if we could land this
> before the next merge window, I'm worried about merge or semantic
> conflicts of having both patches in a tree at one time.
>
> I guess we could send it to Linus, let it get backported into stable,
> and then revert it during the merge window, ahead of applying the
> data=journal cleanup patch series.  But that seems a bit ugly.  Or we
> could ask for an exception from the stable kernel folks, after I do a
> full set of xfstests runs on it.  (Of course, I don't think anyone has
> been able to create a reliable reproducer, so all we can do is to test
> for regression failures.)
>
> Jan, Greg, what do you think?

We've noticed this appearing for us as well now (on 5.15 with
data=journaled) and I wanted to ask what the status here is. Did any fix
here make it into a stable kernel yet? If not, I suppose I can still
apply the patch posted above as a quick-fix until this (or another
solution) makes it into the stable tree?

Best,
Marcus
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