linux-kernel - Re: [PATCH] sendfile removal

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Message-ID: <18014.48878.442628.260297@notabene.brown>
Date:	Thu, 31 May 2007 22:26:22 +1000
From:	Neil Brown <neilb@...e.de>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, cotte@...ibm.com, hugh@...itas.com,
	zanussi@...ibm.com, Linus Torvalds <torvalds@...l.org>
Subject: Re: [PATCH] sendfile removal

On Thursday May 31, jens.axboe@...cle.com wrote:
> On Thu, May 31 2007, Christoph Hellwig wrote:
> > On Thu, May 31, 2007 at 12:33:16PM +0200, Jens Axboe wrote:
> > > - nfds: The ->rq_sendfile_ok optimization is gone for now. I can't
> > >   determine the value of it, but I'm assuming it's there for a reason.
> > >   Any chance this can be converted to splice, or use something else than
> > >   ->sendfile()? CC'ed Neil.
> > 
> > sendfile useage in nfsd avoids a data copy and allows to use checksum
> > offloading.  it's quite important for nfs server workloads.
> 
> OK, I hope Neil can provide some input on how to convert it. Of course
> I'm just fishing for Neil to actually do that work :-)

Well, seeing you did that zero-length-barrier thing for me, how can I
complain :-)

I'll have a look in the morning.

NeilBrown
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