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Date:   Wed, 5 Aug 2020 21:19:09 -0400
From:   Sasha Levin <>
To:     Jan Kara <>
        Jiang Ying <>
Subject: Re: [PATCH v4] ext4: fix direct I/O read error

On Wed, Aug 05, 2020 at 10:51:07AM +0200, Jan Kara wrote:
>Note to stable tree maintainers (summary from the rather long changelog):
>This is a non-upstream patch. It will not go upstream because the problem
>there has been fixed by converting ext4 to use iomap infrastructure.
>However that change is out of scope for stable kernels and this is a
>minimal fix for the problem that has hit real-world applications so I think
>it would be worth it to include the fix in stable trees. Thanks.

How far back should it go? It breaks the build on 4.9 and 4.4 but the
fix for the breakage is trivial.

It does however suggest that this fix wasn't tested on 4.9 or 4.4, so
I'd like to clarify it here before fixing it up (or dropping it).


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