From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 11 Jan 2007 19:04:50 -0800 (PST) From: Christoph Lameter Subject: Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown In-Reply-To: <45A6D118.5030508@yahoo.com.au> Message-ID: 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> <45A6D118.5030508@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: David Chinner , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Fri, 12 Jan 2007, Nick Piggin wrote: > Ah yes... Can't you force it on if you have a NUMA complied kernel? But it wont do anything since it only comes into action if you have an off node allocation. If you run a NUMA kernel on an SMP system then you only have one node. There is no way that an off node allocation can occur. > > 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. zone reclaim is not touching dirty pages in its default configuration. It would only remove up clean pagecache pages. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org