linux-kernel - Re: [PATCH v3 05/13] generic/1226: Add atomic write test using fio crc check verifier

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Message-ID: <9b9ed959-bda5-4a92-90c7-a621ffe58240@oracle.com>
Date: Wed, 23 Jul 2025 17:25:41 +0100
From: John Garry <john.g.garry@...cle.com>
To: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
Cc: Zorro Lang <zlang@...hat.com>, fstests@...r.kernel.org,
        Ritesh Harjani <ritesh.list@...il.com>, djwong@...nel.org,
        tytso@....edu, linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v3 05/13] generic/1226: Add atomic write test using fio
 crc check verifier

On 23/07/2025 14:51, Ojaswin Mujoo wrote:
>>> No, its just something i hardcoded for that particular run. This patch
>>> doesn't enforce hardware only atomic writes
>> If we are to test this for XFS then we need to ensure that HW atomics are
>> available.
> Why is that? Now with the verification step happening after writes,
> software atomic writes should also pass this test since there are no
> racing writes to the verify reads.

Sure, but racing software atomic writes against other software atomic 
writes is not safe.

Thanks,
John