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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aIDozETJ8aLparYV@li-dc0c254c-257c-11b2-a85c-98b6c1322444.ibm.com>
Date: Wed, 23 Jul 2025 19:21:40 +0530
From: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
To: John Garry <john.g.garry@...cle.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 Wed, Jul 23, 2025 at 12:33:27PM +0100, John Garry wrote:
> On 22/07/2025 09:47, Ojaswin Mujoo wrote:
> > > > Yes, I've tested with XFS with software fallback as well. Also, tested
> > > > xfs while keeping io size as 16kb so we stress the hw paths too.
> > > so is that requirement implemented with the _require_scratch_write_atomic
> > > check?
> > 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.

Regards,
ojaswin
> 
> Thanks,
> John