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From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: jack@suse.cz, Ruan Shiyang <ruansy.fnst@cn.fujitsu.com>,
	linux-nvdimm@lists.01.org, darrick.wong@oracle.com,
	david@fromorbit.com, linux-kernel@vger.kernel.org,
	linux-xfs@vger.kernel.org, ocfs2-devel@oss.oracle.com,
	viro@zeniv.linux.org.uk, Goldwyn Rodrigues <rgoldwyn@suse.com>,
	linux-fsdevel@vger.kernel.org, dan.j.williams@intel.com,
	linux-btrfs@vger.kernel.org
Subject: Re: [Ocfs2-devel] [PATCH 5/7] fsdax: Dedup file range to use a compare function
Date: Thu, 25 Feb 2021 08:35:25 +0100	[thread overview]
Message-ID: <20210225073525.GA3448@lst.de> (raw)
In-Reply-To: <20210218162018.GT7193@magnolia>

On Thu, Feb 18, 2021 at 08:20:18AM -0800, Darrick J. Wong wrote:
> > I think a nested call like this is necessary.  That's why I use the open
> > code way.
> 
> This might be a good place to implement an iomap_apply2() loop that
> actually /does/ walk all the extents of file1 and file2.  There's now
> two users of this idiom.

Why do we need a special helper for that?

> (Possibly structured as a "get next mappings from both" generator
> function like Matthew Wilcox keeps asking for. :))

OTOH this might be a good first use for that.

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  reply	other threads:[~2021-02-25  7:35 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-07 17:09 [Ocfs2-devel] [PATCH 0/7] fsdax, xfs: Add reflink&dedupe support for fsdax Shiyang Ruan
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 1/7] fsdax: Output address in dax_iomap_pfn() and rename it Shiyang Ruan
2021-02-08 15:11   ` Christoph Hellwig
2021-02-22  7:44   ` Xiaoguang Wang
2021-02-23  1:32     ` [Ocfs2-devel] 回复: " ruansy.fnst
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 2/7] fsdax: Introduce dax_copy_edges() for CoW Shiyang Ruan
2021-02-08 15:11   ` Christoph Hellwig
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 3/7] fsdax: Copy data before write Shiyang Ruan
2021-02-08 15:14   ` Christoph Hellwig
2021-02-09  1:53     ` Ruan Shiyang
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 4/7] fsdax: Replace mmap entry in case of CoW Shiyang Ruan
2021-02-08 15:16   ` Christoph Hellwig
2021-02-16 13:11   ` David Sterba
2021-02-17  3:06     ` Ruan Shiyang
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 5/7] fsdax: Dedup file range to use a compare function Shiyang Ruan
2021-02-08 15:19   ` Christoph Hellwig
2021-02-09  9:15     ` Ruan Shiyang
2021-02-09  9:34       ` Christoph Hellwig
2021-02-09  9:46         ` Ruan Shiyang
2021-02-10 13:19           ` Christoph Hellwig
2021-02-17  3:24             ` Ruan Shiyang
2021-02-18 16:20               ` Darrick J. Wong
2021-02-25  7:35                 ` Christoph Hellwig [this message]
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 6/7] fs/xfs: Handle CoW for fsdax write() path Shiyang Ruan
2021-02-08 15:24   ` Christoph Hellwig
2021-02-07 17:09 ` [Ocfs2-devel] [PATCH 7/7] fs/xfs: Add dedupe support for fsdax Shiyang Ruan
2021-02-08 15:39 ` [Ocfs2-devel] [PATCH 0/7] fsdax, xfs: Add reflink&dedupe " Jan Kara
2021-02-09  1:50   ` Ruan Shiyang

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