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Subject: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()
From: Arjan van de Ven <arjan@infradead.org>
To: Andi Kleen <ak@suse.de>
Cc: linux-kernel@vger.kernel.org, linux@horizon.com, lkml.hyoshiok@gmail.com
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Date: Mon, 15 Aug 2005 17:09:12 +0200
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On Mon, 2005-08-15 at 17:02 +0200, Andi Kleen wrote:
> Arjan van de Ven <arjan@infradead.org> writes:
> 
> > On Mon, 2005-08-15 at 08:15 -0400, linux@horizon.com wrote:
> > > Actually, is there any place *other* than write() to the page cache that
> > > warrants a non-temporal store?  Network sockets with scatter/gather and
> > > hardware checksum, maybe?
> > 
> > afaik those use zero copy already, eg straight pagecache copy.
> 
> Only if you use sendfile(). And the normal write path uses csum_copy_* 

but do those use s/g ? and hw csum?