Messages in this thread | | | Date | Mon, 15 Aug 2005 17:13:34 +0200 | From | Andi Kleen <> | Subject | Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll() |
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On Mon, Aug 15, 2005 at 05:09:12PM +0200, Arjan van de Ven wrote: > 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 ?
sendfile yes. sendmsg also when the MTU of the device is larger than a page.
> and hw csum?
sendmsg normally not.
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