Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752156AbZKMFX0 (ORCPT ); Fri, 13 Nov 2009 00:23:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751591AbZKMFXW (ORCPT ); Fri, 13 Nov 2009 00:23:22 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:53173 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751480AbZKMFXU (ORCPT ); Fri, 13 Nov 2009 00:23:20 -0500 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: Mel Gorman Subject: Re: [PATCH 1/5] page allocator: Always wake kswapd when restarting an allocation attempt after direct reclaim failed Cc: kosaki.motohiro@jp.fujitsu.com, 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 In-Reply-To: <1258054235-3208-2-git-send-email-mel@csn.ul.ie> References: <1258054235-3208-1-git-send-email-mel@csn.ul.ie> <1258054235-3208-2-git-send-email-mel@csn.ul.ie> Message-Id: <20091113142026.33AD.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Fri, 13 Nov 2009 14:23:21 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1815 Lines: 42 > 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? ----------------------------------------------------------------- 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 -- 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/