Re: [RFC] extending splice for copy offloading

[Bernd Schubert]

On 09/30/2013 07:44 PM, Myklebust, Trond wrote:
> On Mon, 2013-09-30 at 19:17 +0200, Bernd Schubert wrote:
> > It would be nice if there would be way if the file system would get a
> > hint that the target file is supposed to be copy of another file. That
> > way distributed file systems could also create the target-file with the
> > correct meta-information (same storage targets as in-file has).
> > Well, if we cannot agree on that, file system with a custom protocol at
> > least can detect from 0 to SSIZE_MAX and then reset metadata. I'm not
> > sure if this would work for pNFS, though.
>
> splice() does not create new files. What you appear to be asking for
> lies way outside the scope of that system call interface.

Sorry I know, definitely outside the scope of splice, but in the context 
of offloaded file copies. So the question is, what is the best way to 
address/discuss that?

Thanks,
Bernd
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