Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753816AbYCITMY (ORCPT ); Sun, 9 Mar 2008 15:12:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751845AbYCITMP (ORCPT ); Sun, 9 Mar 2008 15:12:15 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:52116 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751371AbYCITMO (ORCPT ); Sun, 9 Mar 2008 15:12:14 -0400 Date: Sun, 9 Mar 2008 12:11:03 -0700 From: Arjan van de Ven To: Ingo Molnar Cc: KOSAKI Motohiro , Thomas Gleixner , LKML , Linus Torvalds , Andrew Morton , Christoph Lameter , Bart Van Assche Subject: Re: quicklists confuse meminfo Message-ID: <20080309121103.3f7019d5@laptopd505.fenrus.org> In-Reply-To: <20080309123432.GA3267@elte.hu> References: <20080309111456.GA21690@elte.hu> <20080309210000.C6DE.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080309120940.GA1695@elte.hu> <20080309123432.GA3267@elte.hu> Organization: Intel X-Mailer: Claws Mail 3.2.0 (GTK+ 2.12.5; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1329 Lines: 34 On Sun, 9 Mar 2008 13:34:32 +0100 Ingo Molnar wrote: > > * Ingo Molnar wrote: > > > > IMHO we need shrink pgtable cache mecanism. > > > > ouch! Could you try the patch below? How large is the quicklist > > cache with this applied? > > hm, Thomas pointed it out that this wont solve all the problems as > quicklists have a built-in "preserve me" throttle (which is rather > stupid). > > the right solution is to get rid of quicklists altogether (Thomas > expects to have patches for that later today). careful with this; the quicklists aren't JUST for speed they are also there to make sure a page we free that is a pagetable, is not reused until we have finished flushing the tlbs on all the cpus that saw it. This is a really hard correctness requirement, and while I can see that quicklists are probably not the best way to achieve this, we can't just throw away the behavior ;( -- If you want to reach me at my work email, use arjan@linux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/