From: Christophe Leroy <[email protected]> Date: Tue, 23 Sep 2014 10:54:32 +0200 (CEST)
> csum_partial() is a generic function which is not optimised for small fixed > length calculations, and its use requires to store "from" and "to" values in > memory while we already have them available in registers. This also has > impact, > especially on RISC processors. In the same spirit as the change done by > Eric Dumazet on csum_replace2(), this patch rewrites > inet_proto_csum_replace4() > taking into account RFC1624. > > I spotted during a NATted tcp transfert that csum_partial() is one of top 5 > consuming functions (around 8%), and the second user of csum_partial() is > inet_proto_csum_replace4(). > > I have proposed the same modification to inet_proto_csum_replace4() in another > patch. > > Signed-off-by: Christophe Leroy <[email protected]> Applied. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
