Date: Thu, 15 Oct 2015 22:38:08 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Austin S Hemmelgarn <ahferroin7@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Anna Schumaker <Anna.Schumaker@netapp.com>,
        "Darrick J. Wong" <darrick.wong@oracle.com>, linux-nfs@vger.kernel.org,
        Linux btrfs Developers List <linux-btrfs@vger.kernel.org>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        Linux API <linux-api@vger.kernel.org>, Zach Brown <zab@zabbo.net>,
        Al Viro <viro@zeniv.linux.org.uk>, Chris Mason <clm@fb.com>,
        Michael Kerrisk-manpages <mtk.manpages@gmail.com>, andros@netapp.com
Subject: Re: [PATCH v5 8/9] vfs: Add vfs_copy_file_range() support for
 pagecache copies
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On Thu, Oct 15, 2015 at 08:24:51AM -0400, Austin S Hemmelgarn wrote:
> My only point with saying we shouldn't reflink by default is that there are
> many (unintelligent) people who will assume that since the syscall has copy
> in it's name, that's what it will do; and, while I don't think we should
> cater to such individuals, it does make sense to have a syscall that says in
> it's name that it copies data actually do so by default.

As far as the user is concerned a reflink is a copy.  A very efficient
copy.