Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753854AbYCITZm (ORCPT ); Sun, 9 Mar 2008 15:25:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752508AbYCITZc (ORCPT ); Sun, 9 Mar 2008 15:25:32 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:37952 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751845AbYCITZc (ORCPT ); Sun, 9 Mar 2008 15:25:32 -0400 Date: Sun, 9 Mar 2008 20:25:14 +0100 From: Ingo Molnar To: Arjan van de Ven Cc: KOSAKI Motohiro , Thomas Gleixner , LKML , Linus Torvalds , Andrew Morton , Christoph Lameter , Bart Van Assche Subject: Re: quicklists confuse meminfo Message-ID: <20080309192514.GA16759@elte.hu> References: <20080309111456.GA21690@elte.hu> <20080309210000.C6DE.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080309120940.GA1695@elte.hu> <20080309123432.GA3267@elte.hu> <20080309121103.3f7019d5@laptopd505.fenrus.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080309121103.3f7019d5@laptopd505.fenrus.org> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=none autolearn=no SpamAssassin version=3.2.3 _SUMMARY_ Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1289 Lines: 30 * Arjan van de Ven wrote: > > > 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 ;( no, that's not true anymore - and the current quicklists code doesnt do anything like that AFAICS. It used to be a lot more complex, but now it's just a thin wrapper around the page allocator. Ingo -- 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/