On Tue, Aug 14, 2007 at 02:14:41AM +0200, Andi Kleen wrote: > On Tue, Aug 14, 2007 at 12:22:23AM +0100, Alan Cox wrote: > > > The only tricky part were skbs in a few drivers, but luckily they are only > > > needed for bouncing which can be done without a skb too. For RX it adds > > > one copy, but we can live with that because they're only slow devices. > > > > Usually found on slow hardware that can't cope with extra copies very > > well. > > It's essentially only lance, meth, b44 and bcm43xx and lots of s390. > > meth is only used on SGI O2s which are not that slow and unlikely > to work in tree anyways. > > b44 and bcm43xx run in fast enough new systems to have no trouble > with copies. bcm43xx hardware does show up on low-end MIPS boxes (wrt54g anybody?) that would be sorely hurt by excess copies. -andy
