From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 16 Oct 2006 06:25:36 -0500 From: Robin Holt Subject: Re: [TAKE] memory page_alloc zonelist caching speedup Message-ID: <20061016112535.GA13218@lnx-holt.americas.sgi.com> References: <20061010081429.15156.77206.sendpatchset@jackhammer.engr.sgi.com> <200610161134.07168.ak@suse.de> <20061016032632.486f4235.pj@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061016032632.486f4235.pj@sgi.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Paul Jackson Cc: Andi Kleen , linux-mm@kvack.org, akpm@osdl.org, nickpiggin@yahoo.com.au, rientjes@google.com, mbligh@google.com, rohitseth@google.com, menage@google.com, clameter@sgi.com List-ID: On Mon, Oct 16, 2006 at 03:26:32AM -0700, Paul Jackson wrote: > Andi wrote: > > Yes but you will add latencies for cache line bounces won't you? > > The old zone lists were completely read only. That is what worries me > > most. Paul, I think Andi is concerned that we will have a heavily shared cache line which now becomes frequently invalidated. That invalidate is quite expensive compared to just letting the lines quietly leave the cpus cache and refetching them. Thanks, Robin -- 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