Message-ID: <1323965498.14317.13.camel@lade.trondhjem.org>
Subject: RE: copy offload support in Linux - new system call needed?
From: Trond Myklebust <Trond.Myklebust@netapp.com>
To: "Loke, Chetan" <Chetan.Loke@netscout.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
        Ric Wheeler <ricwheeler@gmail.com>, Al Viro <viro@ZenIV.linux.org.uk>,
        linux-scsi@vger.kernel.org,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Hannes Reinecke <hare@suse.de>,
        Andrew Morton <akpm@linux-foundation.org>, linux-nfs@vger.kernel.org,
        Joel Becker <jlbec@evilplan.org>,
        James Bottomley <James.Bottomley@HansenPartnership.com>
Date: Thu, 15 Dec 2011 11:11:38 -0500
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On Thu, 2011-12-15 at 11:08 -0500, Loke, Chetan wrote: 
> > How would the server know? I suggest we deal with this by adding an
> > ioctl() to allow the application to poll for progress: I'm assuming now
> 
> Why not support something like the async-iocb?

You could, but that would tie copyfile() to the aio interface which was
one of the things that I believe Al was opposed to when we discussed
this at LSF/MM-2010.

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@netapp.com
www.netapp.com