linux-ext4 - Re: [PATCH 23/29] xfs: use IOMAP

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Message-ID: <20211124071430.GD7229@lst.de>
Date:   Wed, 24 Nov 2021 08:14:30 +0100
From:   Christoph Hellwig <hch@....de>
To:     "Darrick J. Wong" <djwong@...nel.org>
Cc:     Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Mike Snitzer <snitzer@...hat.com>,
        Ira Weiny <ira.weiny@...el.com>, dm-devel@...hat.com,
        linux-xfs@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-s390@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 23/29] xfs: use IOMAP_DAX to check for DAX mappings

On Tue, Nov 23, 2021 at 03:01:24PM -0800, Darrick J. Wong wrote:
> On Tue, Nov 09, 2021 at 09:33:03AM +0100, Christoph Hellwig wrote:
> > Use the explicit DAX flag instead of checking the inode flag in the
> > iomap code.
> > 
> > Signed-off-by: Christoph Hellwig <hch@....de>
> 
> Any particular reason to pass this in as a flag vs. querying the inode?

Same reason as the addition of IOMAP_DAX.  But I think I'll redo this
a bit to do the XFS paramater passing first and then actually check
IOMAP_DAX together with introducing it to make it all a little more clear.