From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933358AbXCBNwp (ORCPT ); Fri, 2 Mar 2007 08:52:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933357AbXCBNwp (ORCPT ); Fri, 2 Mar 2007 08:52:45 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:51426 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933358AbXCBNwn (ORCPT ); Fri, 2 Mar 2007 08:52:43 -0500 Subject: Re: The performance and behaviour of the anti-fragmentation related patches From: Arjan van de Ven To: Andrew Morton Cc: Mel Gorman , npiggin@suse.de, clameter@engr.sgi.com, mingo@elte.hu, jschopp@austin.ibm.com, torvalds@linux-foundation.org, mbligh@mbligh.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <20070301160915.6da876c5.akpm@linux-foundation.org> References: <20070301101249.GA29351@skynet.ie> <20070301160915.6da876c5.akpm@linux-foundation.org> Content-Type: text/plain Organization: Intel International BV Date: Fri, 02 Mar 2007 05:50:57 -0800 Message-Id: <1172843457.3237.11.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-1.fc6) 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 X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2007-03-01 at 16:09 -0800, Andrew Morton wrote: > And I'd judge that per-container RSS limits are of considerably more value > than antifrag (in fact per-container RSS might be a superset of antifrag, > in the sense that per-container RSS and containers could be abused to fix > the i-cant-get-any-hugepages problem, dunno). Hi, the RSS thing is.. .funky. I'm saying that because we have not been able to define what RSS means, so before we expand how RSS is used that needs solving first. This is relevant for the pagetable sharing patches: if RSS can exclude shared, they're relatively easy. If RSS has to include shared always, we have currently a problem because hugepages aren't part of RSS right now. I would really really really like to see this unclarity sorted out on the concept level before going through massive changes in the code based on something so fundamentally unclear. -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org