linux-kernel - Re: [PATCH 5/7] fsdax: Dedup file range to use a compare function

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Message-ID: <79b0d65c-95dd-4821-e412-ab27c8cb6942@cn.fujitsu.com>
Date:   Tue, 9 Feb 2021 17:46:13 +0800
From:   Ruan Shiyang <ruansy.fnst@...fujitsu.com>
To:     Christoph Hellwig <hch@....de>
CC:     <linux-kernel@...r.kernel.org>, <linux-xfs@...r.kernel.org>,
        <linux-nvdimm@...ts.01.org>, <linux-fsdevel@...r.kernel.org>,
        <darrick.wong@...cle.com>, <dan.j.williams@...el.com>,
        <willy@...radead.org>, <jack@...e.cz>, <viro@...iv.linux.org.uk>,
        <linux-btrfs@...r.kernel.org>, <ocfs2-devel@....oracle.com>,
        <david@...morbit.com>, <rgoldwyn@...e.de>,
        Goldwyn Rodrigues <rgoldwyn@...e.com>
Subject: Re: [PATCH 5/7] fsdax: Dedup file range to use a compare function



On 2021/2/9 下午5:34, Christoph Hellwig wrote:
> On Tue, Feb 09, 2021 at 05:15:13PM +0800, Ruan Shiyang wrote:
>> The dax dedupe comparison need the iomap_ops pointer as argument, so my
>> understanding is that we don't modify the argument list of
>> generic_remap_file_range_prep(), but move its code into
>> __generic_remap_file_range_prep() whose argument list can be modified to
>> accepts the iomap_ops pointer.  Then it looks like this:
> 
> I'd say just add the iomap_ops pointer to
> generic_remap_file_range_prep and do away with the extra wrappers.  We
> only have three callers anyway.

OK.


--
Thanks,
Ruan Shiyang.
> 
>