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Date: Mon, 23 Sep 2024 05:33:05 +0200
From: Christoph Hellwig <hch@lst.de>
To: Dave Chinner <david@fromorbit.com>
Cc: John Garry <john.g.garry@oracle.com>,
	Ritesh Harjani <ritesh.list@gmail.com>, chandan.babu@oracle.com,
	djwong@kernel.org, dchinner@redhat.com, hch@lst.de,
	viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz,
	linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, catherine.hoang@oracle.com,
	martin.petersen@oracle.com
Subject: Re: [PATCH v4 00/14] forcealign for xfs
Message-ID: <20240923033305.GA30200@lst.de>
References: <87frqf2smy.fsf@gmail.com> <ZtjrUI+oqqABJL2j@dread.disaster.area> <877cbq3g9i.fsf@gmail.com> <ZtlQt/7VHbOtQ+gY@dread.disaster.area> <8734m7henr.fsf@gmail.com> <ZufYRolfyUqEOS1c@dread.disaster.area> <c8a9dba5-7d02-4aa2-a01f-dd7f53b24938@oracle.com> <Zun+yci6CeiuNS2o@dread.disaster.area> <8e13fa74-f8f7-49d3-b640-0daf50da5acb@oracle.com> <ZvDZHC1NJWlOR6Uf@dread.disaster.area>
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On Mon, Sep 23, 2024 at 12:57:32PM +1000, Dave Chinner wrote:
> Ok, but that's not going to be widespread. Very little storage
> hardware out there supports atomic writes - the vast majority of
> deployments will be new hardware that will have mkfs run on it.

Just about every enterprise NVMe SSD supports atomic write size
larger than a single LBA, because it is completely natural fallout
from FTL deѕign.  That beeing said to support those SSDs a block
size of 16 or 32k would be a lot more natural than all the forcealign
madness.