Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763947AbZD3Nzf (ORCPT ); Thu, 30 Apr 2009 09:55:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762233AbZD3NzU (ORCPT ); Thu, 30 Apr 2009 09:55:20 -0400 Received: from tomts40.bellnexxia.net ([209.226.175.97]:62343 "EHLO tomts40-srv.bellnexxia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1762222AbZD3NzR (ORCPT ); Thu, 30 Apr 2009 09:55:17 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsFAD9E+UlMQW1W/2dsb2JhbACBUM4kg38F Date: Thu, 30 Apr 2009 09:50:05 -0400 From: Mathieu Desnoyers To: Ingo Molnar Cc: Christoph Lameter , Linus Torvalds , Andrew Morton , Nick Piggin , KOSAKI Motohiro , Peter Zijlstra , thomas.pi@arcor.dea, Yuriy Lalym , Linux Kernel Mailing List , ltt-dev@lists.casi.polymtl.ca Subject: Re: [PATCH] Fix dirty page accounting in redirty_page_for_writepage() Message-ID: <20090430135005.GA5922@Krystal> References: <20090429232546.GB15782@Krystal> <20090430024303.GB19875@Krystal> <20090430133859.GB8329@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline In-Reply-To: <20090430133859.GB8329@elte.hu> X-Editor: vi X-Info: http://krystal.dyndns.org:8080 X-Operating-System: Linux/2.6.21.3-grsec (i686) X-Uptime: 09:46:26 up 61 days, 10:12, 1 user, load average: 0.62, 0.75, 0.58 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1308 Lines: 40 * Ingo Molnar (mingo@elte.hu) wrote: > > * Christoph Lameter wrote: > > > On Wed, 29 Apr 2009, Mathieu Desnoyers wrote: > > > > > to have a good look at the memory accounting code. We could > > > probably benefit of Christoph Lameter's cpu ops (using segment > > > registers to address per-cpu variables with atomic inc/dec) in > > > there. Or at least removing interrupt disabling by using preempt > > > disable and local_t variables for the per-cpu counters could > > > bring some benefit. > > > > Guess we are ready for atomic per cpu ops now that the new per cpu > > allocator is in? Segment register issues with the PDA are also > > solved right? > > it's all done, implemented and upstream already. You are a bit late > to the party ;-) > > Ingo Or way too early, depending on the point of view. :-) e.g. http://lkml.org/lkml/2008/5/30/3 I think Christoph deserves credits for pioneering this area with fresh ideas. Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 -- 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/