Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751517AbXALAHR (ORCPT ); Thu, 11 Jan 2007 19:07:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751531AbXALAHR (ORCPT ); Thu, 11 Jan 2007 19:07:17 -0500 Received: from smtp110.mail.mud.yahoo.com ([209.191.85.220]:32148 "HELO smtp110.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751517AbXALAHP (ORCPT ); Thu, 11 Jan 2007 19:07:15 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=EvhubOlucxpGl303KggN+6hGYeFk6XxhkKBmb3j22H2/TYo8J3iM36dx5A8ApqPFTVHupPhDEq3RUmnzVNmgi1aFl5Pi4T0rrBelpHboOIE6fvI+/wMKHgZVy+H5i6GuWiLgJBnVJQqDM7+PyiI6GoMbEANA5LZ/N/g4d6JqGJE= ; X-YMail-OSG: _mQ5jS8VM1kUfrkbkNhy6KOGYiT0xnDzwGwRaeIjc3Y8.ngXeizCqI6JLRnLHLxqXVj7gev6njq.jJshF8fSgbqU4IkQiIHnprSXiBd5c.hDL6k33UwYNJFiKZ06d7JVfwOe_kQwtVqi0p4- Message-ID: <45A6D118.5030508@yahoo.com.au> Date: Fri, 12 Jan 2007 11:06:48 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Christoph Lameter CC: David Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown References: <20070110223731.GC44411608@melbourne.sgi.com> <20070110230855.GF44411608@melbourne.sgi.com> <45A57333.6060904@yahoo.com.au> <20070111003158.GT33919298@melbourne.sgi.com> <45A58DFA.8050304@yahoo.com.au> <20070111012404.GW33919298@melbourne.sgi.com> <45A602F0.1090405@yahoo.com.au> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 812 Lines: 26 Christoph Lameter wrote: > On Thu, 11 Jan 2007, Nick Piggin wrote: > > >>You're not turning on zone_reclaim, by any chance, are you? > > > It is not a NUMA system so zone reclaim is not available. Ah yes... Can't you force it on if you have a NUMA complied kernel? > zone reclaim was > already in 2.6.16. Well it was a long shot, but that is something that has had a few changes recently and is something that could interact badly with the global pdflush. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - 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/