linux-kernel - Re: [PATCH AUTOSEL 5.7 244/274] xfs: force writes to delalloc regions to unwritten

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Date:   Mon, 8 Jun 2020 22:10:21 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Brian Foster <bfoster@...hat.com>, linux-xfs@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.7 244/274] xfs: force writes to delalloc
 regions to unwritten

On Mon, Jun 08, 2020 at 06:07:27PM -0700, Darrick J. Wong wrote:
>On Mon, Jun 08, 2020 at 07:05:37PM -0400, Sasha Levin wrote:
>> From: "Darrick J. Wong" <darrick.wong@...cle.com>
>>
>> [ Upstream commit a5949d3faedf492fa7863b914da408047ab46eb0 ]
>>
>> When writing to a delalloc region in the data fork, commit the new
>> allocations (of the da reservation) as unwritten so that the mappings
>> are only marked written once writeback completes successfully.  This
>> fixes the problem of stale data exposure if the system goes down during
>> targeted writeback of a specific region of a file, as tested by
>> generic/042.
>>
>> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
>> Reviewed-by: Christoph Hellwig <hch@....de>
>> Reviewed-by: Brian Foster <bfoster@...hat.com>
>> Signed-off-by: Sasha Levin <sashal@...nel.org>
>
>Err, this doesn't have a Fixes: tag attached to it.  Does it pass
>fstests?  Because it doesn't look like you've pulled in "xfs: don't fail
>unwritten extent conversion on writeback due to edquot", which is needed
>to avoid regressing fstests...
>
>...waitaminute, that whole series lacks Fixes: tags because it wasn't
>considered a good enough candidate for automatic backport.

AUTOSEL doesn't look just at the Fixes tag :)

>Ummm, does the autosel fstests driver turn on quotas? ;)

Uh, apparently not :/ Is it okay to just enable it across all tests?

While I go fix that up, would you rather drop the series, or pick up
1edd2c055dff ("xfs: don't fail unwritten extent conversion on writeback
due to edquot")?`

-- 
Thanks,
Sasha