Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()

Arjan van de Ven
2005-08-15T15:09:20Z

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?