From: Christoph Hellwig <hch@lst.de>
To: Theodore Ts'o <tytso@mit.edu>
Cc: Christoph Hellwig <hch@lst.de>,
John Garry <john.g.garry@oracle.com>,
"Darrick J. Wong" <djwong@kernel.org>,
linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-block@vger.kernel.org, linux-nvme@lists.infradead.org
Subject: Re: Do we need an opt-in for file systems use of hw atomic writes?
Date: Mon, 14 Jul 2025 15:30:14 +0200 [thread overview]
Message-ID: <20250714133014.GA10090@lst.de> (raw)
In-Reply-To: <20250714132407.GC41071@mit.edu>
On Mon, Jul 14, 2025 at 09:24:07AM -0400, Theodore Ts'o wrote:
> > Is is just me, or would it be a good idea to require an explicit
> > opt-in to user hardware atomics?
>
> How common do we think broken atomics implementations; is this
> something that we could solve using a blacklist of broken devices?
I don't know. But cheap consumer SSDs can basically exhibit any
brokenness you can imagine. And claiming to support atomics basically
just means filling out a single field in identify with a non-zero
value. So my hopes of only seeing it in a few devices is low,
moreover we will only notice it was broken when people lost data.
next prev parent reply other threads:[~2025-07-14 13:30 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-14 13:17 Do we need an opt-in for file systems use of hw atomic writes? Christoph Hellwig
2025-07-14 13:24 ` Theodore Ts'o
2025-07-14 13:30 ` Christoph Hellwig [this message]
2025-07-14 16:04 ` Darrick J. Wong
2025-07-15 6:00 ` Christoph Hellwig
2025-07-15 3:22 ` Martin K. Petersen
2025-07-15 6:00 ` Christoph Hellwig
2025-07-15 12:45 ` Martin K. Petersen
2025-07-14 13:39 ` John Garry
2025-07-14 13:50 ` Christoph Hellwig
2025-07-14 15:53 ` John Garry
2025-07-15 6:02 ` Christoph Hellwig
2025-07-15 8:42 ` John Garry
2025-07-15 9:03 ` Christoph Hellwig
2025-08-19 11:42 ` John Garry
2025-08-19 13:39 ` Christoph Hellwig
2025-08-19 14:36 ` John Garry
2025-08-19 14:43 ` Darrick J. Wong
2025-08-19 14:45 ` Christoph Hellwig
2025-08-21 14:01 ` Keith Busch
2025-07-15 10:02 ` Christian Brauner
2025-07-15 11:29 ` Christoph Hellwig
2025-07-15 12:20 ` Christian Brauner
2025-07-15 11:58 ` Theodore Ts'o
2025-07-14 20:53 ` Dave Chinner
2025-07-15 6:05 ` Christoph Hellwig
2025-07-15 20:56 ` Keith Busch
2025-07-16 5:50 ` Nilay Shroff
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