From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 16 Oct 2006 09:58:05 -0700 From: Paul Jackson Subject: Re: [TAKE] memory page_alloc zonelist caching speedup Message-Id: <20061016095805.f7576230.pj@sgi.com> In-Reply-To: <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> <20061016112535.GA13218@lnx-holt.americas.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Robin Holt Cc: ak@suse.de, 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: Robin wrote: > Paul, I think Andi is concerned that we will have a heavily shared > cache line which now becomes frequently invalidated. Once a second invalidation of a few cache lines that are only accessed from one node beats once per memory allocation cross-node accesses of cache lines invalidated every free. Big time. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401 -- 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