Re: [PATCH v5 8/9] vfs: Add vfs_copy_file_range() support for pagecache copies

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On Wed, Oct 14, 2015 at 11:27 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Wed, Oct 14, 2015 at 11:08:40AM -0700, Andy Lutomirski wrote:
>> > So what I'm hearing is that I should drop the reflink and dedup flags and change this system call only perform a full copy (with preserving of sparseness), correct?  I can make those changes, but only if everybody is in agreement that it's the best way forward.
>>
>> I personally rather like the reflink option.  That thing is quite useful.
>
> reflink is very useful, probably more useful than the copy actually. But it
> is different from a copy.  It should be a separate interface.

One might argue that reflink is like copy + immediate dedupe.  Also, I
can imagine there being network protocols over which you can't really
tell the difference between reflink and server-to-server copy.

--Andy

-- 
Andy Lutomirski
AMA Capital Management, LLC
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