linux-ext4 - Re: [PATCH v7 04/12] ltp/fsx.c: Add atomic writes support to fsx

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Message-ID: <3b201807-439f-4dc9-af20-7e2cdad112f3@oracle.com>
Date: Thu, 23 Oct 2025 16:44:36 +0100
From: John Garry <john.g.garry@...cle.com>
To: Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
        "Darrick J. Wong"
 <djwong@...nel.org>
Cc: Brian Foster <bfoster@...hat.com>, Zorro Lang <zlang@...hat.com>,
        fstests@...r.kernel.org, Ritesh Harjani <ritesh.list@...il.com>,
        tytso@....edu, linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v7 04/12] ltp/fsx.c: Add atomic writes support to fsx

On 22/10/2025 08:40, Ojaswin Mujoo wrote:
>> FWIW I see a somewhat different failure -- not data corruption, but
>> pwrite returning failure:
>> --- /run/fstests/bin/tests/generic/521.out      2025-07-15 14:45:15.100315255 -0700
>> +++ /var/tmp/fstests/generic/521.out.bad        2025-10-21 10:33:39.032263811 -0700
>> @@ -1,2 +1,668 @@
>>   QA output created by 521
>> +dowrite: write: Input/output error
> Hmm that's strange. Can you try running the above command with
> prep.fsxops that I've shared. You'll need to pull the fsx atomic write
> changes in this patch for it to work. I've been running on non atomic
> write device btw.

JFYI, I can see this issue with v6.18-rc2 and generic/760

I'll investigate...