linux-kernel - Re: [PATCH 2/6] fs: Add FS_XFLAG

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Date: Tue, 13 Feb 2024 07:56:36 +0100
From: Christoph Hellwig <hch@....de>
To: John Garry <john.g.garry@...cle.com>
Cc: "Darrick J. Wong" <djwong@...nel.org>, hch@....de,
	viro@...iv.linux.org.uk, brauner@...nel.org, dchinner@...hat.com,
	jack@...e.cz, chandan.babu@...cle.com, martin.petersen@...cle.com,
	linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, tytso@....edu, jbongio@...gle.com,
	ojaswin@...ux.ibm.com
Subject: Re: [PATCH 2/6] fs: Add FS_XFLAG_ATOMICWRITES flag

On Mon, Feb 05, 2024 at 12:58:30PM +0000, John Garry wrote:
> To me that sounds like "try to use DAX for IO, and, if not possible, fall 
> back on some other method" - is that reality of what that flag does?

Yes.  Of course for a fallback on XFS we need Darrick's swapext log
item.  Which would be good to have..