From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 14 Aug 2007 12:11:59 -0700 From: Andy Isaacson Subject: Re: [PATCH 3/4] Embed zone_id information within the zonelist->zones pointer Message-ID: <20070814191158.GB14093@hexapodia.org> References: <20070813225841.GG3406@bingen.suse.de> <20070813230801.GH3406@bingen.suse.de> <20070813234322.GJ3406@bingen.suse.de> <20070814000041.GL3406@bingen.suse.de> <20070814002223.2d8d42c5@the-village.bc.nu> <20070814001441.GN3406@bingen.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070814001441.GN3406@bingen.suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Alan Cox , Christoph Lameter , Mel Gorman , Lee.Schermerhorn@hp.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-mips@linux-mips.org List-ID: 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org