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Date:   Wed, 26 Feb 2020 05:08:20 -0800
From:   Matthew Wilcox <willy@infradead.org>
To:     Ritesh Harjani <riteshh@linux.ibm.com>
Cc:     jack@suse.cz, tytso@mit.edu, linux-ext4@vger.kernel.org,
        adilger.kernel@dilger.ca, linux-fsdevel@vger.kernel.org,
        darrick.wong@oracle.com, hch@infradead.org, cmaiolino@redhat.com
Subject: Re: [PATCHv3 0/6] ext4: bmap & fiemap conversion to use iomap
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On Wed, Feb 26, 2020 at 03:27:02PM +0530, Ritesh Harjani wrote:
> Background
> ==========
> These are v3 patches to move ext4 bmap & fiemap calls to use iomap APIs.

Are you also planning to switch readpages over in the future?  If so,
I think you'll want this patch:

http://git.infradead.org/users/willy/linux-dax.git/commitdiff/2ef99d3d1dd1941cbf9214f2a49b50f8c9e6f021

I haven't done any performance evaluation here; just reading the code.