From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 57A096B0078 for ; Fri, 13 Nov 2009 08:55:44 -0500 (EST) Date: Fri, 13 Nov 2009 13:55:38 +0000 From: Mel Gorman Subject: Re: [PATCH 1/5] page allocator: Always wake kswapd when restarting an allocation attempt after direct reclaim failed Message-ID: <20091113135538.GG29804@csn.ul.ie> References: <1258054235-3208-1-git-send-email-mel@csn.ul.ie> <1258054235-3208-2-git-send-email-mel@csn.ul.ie> <20091113142026.33AD.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20091113142026.33AD.A69D9226@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: Andrew Morton , Frans Pop , Jiri Kosina , Sven Geggus , Karol Lewandowski , Tobias Oetiker , linux-kernel@vger.kernel.org, "linux-mm@kvack.org" , Pekka Enberg , Rik van Riel , Christoph Lameter , Stephan von Krawczynski , "Rafael J. Wysocki" , Kernel Testers List List-ID: On Fri, Nov 13, 2009 at 02:23:21PM +0900, KOSAKI Motohiro wrote: > > If a direct reclaim makes no forward progress, it considers whether it > > should go OOM or not. Whether OOM is triggered or not, it may retry the > > application afterwards. In times past, this would always wake kswapd as well > > but currently, kswapd is not woken up after direct reclaim fails. For order-0 > > allocations, this makes little difference but if there is a heavy mix of > > higher-order allocations that direct reclaim is failing for, it might mean > > that kswapd is not rewoken for higher orders as much as it did previously. > > > > This patch wakes up kswapd when an allocation is being retried after a direct > > reclaim failure. It would be expected that kswapd is already awake, but > > this has the effect of telling kswapd to reclaim at the higher order as well. > > > > Signed-off-by: Mel Gorman > > Reviewed-by: Christoph Lameter > > Reviewed-by: Pekka Enberg > > Reviewed-by: KOSAKI Motohiro > > Umm, > My mail box have the carbon copy of akpm sent this patch to linus. > (bellow subject and data) > > Does this have any update? > No, it doesn't. I included it in the series for the benefit of testers. > ----------------------------------------------------------------- > Subject: [patch 07/35] page allocator: always wake kswapd when restarting an allocation attempt after direct reclaim failed > To: torvalds@linux-foundation.org > Cc: akpm@linux-foundation.org, > mel@csn.ul.ie, > cl@linux-foundation.org, > kosaki.motohiro@jp.fujitsu.com, > penberg@cs.helsinki.fi, > stable@kernel.org > From: akpm@linux-foundation.org > Date: Wed, 11 Nov 2009 14:26:14 -0800 > > > -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- 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