From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with ESMTP id 9E98D6B0087 for ; Thu, 23 Dec 2010 19:05:34 -0500 (EST) Received: from kpbe12.cbf.corp.google.com (kpbe12.cbf.corp.google.com [172.25.105.76]) by smtp-out.google.com with ESMTP id oBNMIj08003708 for ; Thu, 23 Dec 2010 14:18:50 -0800 Received: from pzk27 (pzk27.prod.google.com [10.243.19.155]) by kpbe12.cbf.corp.google.com with ESMTP id oBNMIhiP003370 for ; Thu, 23 Dec 2010 14:18:43 -0800 Received: by pzk27 with SMTP id 27so1574348pzk.0 for ; Thu, 23 Dec 2010 14:18:42 -0800 (PST) Date: Thu, 23 Dec 2010 14:18:38 -0800 (PST) From: David Rientjes Subject: Re: [PATCH 1/2] mm: page allocator: Adjust the per-cpu counter threshold when memory is low In-Reply-To: <20101129155801.GG13268@csn.ul.ie> Message-ID: References: <1288169256-7174-1-git-send-email-mel@csn.ul.ie> <1288169256-7174-2-git-send-email-mel@csn.ul.ie> <20101126160619.GP22651@bombadil.infradead.org> <20101129095618.GB13268@csn.ul.ie> <20101129131626.GF15818@bombadil.infradead.org> <20101129150824.GF13268@csn.ul.ie> <20101129152230.GH15818@bombadil.infradead.org> <20101129155801.GG13268@csn.ul.ie> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Mel Gorman , Greg Kroah-Hartman , Andrew Morton Cc: Kyle McMartin , Shaohua Li , KOSAKI Motohiro , Christoph Lameter , KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Mon, 29 Nov 2010, Mel Gorman wrote: > Andrew, this patch was a performance fix but is a report saying that it > fixes a functional regression in Fedora enough to push a patch torwards > stable even though an explanation as to *why* it fixes the problem is missing? > We had to pull aa454840 "mm: page allocator: calculate a better estimate of NR_FREE_PAGES when memory is low and kswapd is awake" from 2.6.36 internally because tests showed that it would cause the machine to stall as the result of heavy kswapd activity. I merged it back with this fix as it is pending in the -mm tree and it solves the issue we were seeing, so I definitely think this should be pushed to -stable (and I would seriously consider it for 2.6.37 inclusion even at this late date). -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org