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From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: [PATCH v5 8/9] vfs: Add vfs_copy_file_range() support for
 pagecache copies
Date: Tue, 13 Oct 2015 00:30:50 -0700
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Cc: "Darrick J. Wong" <darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
	Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	Anna Schumaker <Anna.Schumaker-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org>,
	Linux NFS Mailing List <linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
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	Zach Brown <zab-ugsP4Wv/S6ZeoWH0uzbU5w@public.gmane.org>,
	Alexander Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
	Chris Mason <clm-b10kYP2dOMg@public.gmane.org>,
	Michael Kerrisk-manpages <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	William Andros Adamson <andros-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org>
To: Trond Myklebust <trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>
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On Mon, Oct 12, 2015 at 11:36:31PM -0400, Trond Myklebust wrote:
> How is this supposed to be implemented on something like NFS without
> protocol changes?

Explicit dedup has no chance of working over NFS or other network
protocols without protocol changes.
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