"David S. Miller" <davem@redhat.com> writes: > From: Hirokazu Takahashi <taka@valinux.co.jp> > Date: Tue, 03 Sep 2002 16:42:43 +0900 (JST) > > I guess it may also depend on bad implementations of csum_partial(). > It's wrong that some architecture assume every data in a skbuff are > aligned on a 2byte boundary so that it would access a byte next to > the the last byte where no pages might be there. > > It is real requirement, x86 works because unaligned > access is handled transparently by cpu. > > But on every non-x86 csum_partial I have examined, worse than > 2-byte aligned data start is totally not handled. It is not difficult > to figure out why this is the case, everyone has copied by example. :-) x86-64 handles it (also in csum-copy). I think at least Alpha does it too (that is where I stole the C csum-partial base from) But it's ugly. See the odd hack. -Andi - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
