Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752330Ab1FYVm0 (ORCPT ); Sat, 25 Jun 2011 17:42:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42452 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751783Ab1FYVm0 (ORCPT ); Sat, 25 Jun 2011 17:42:26 -0400 Message-ID: <4E065630.2070407@redhat.com> Date: Sat, 25 Jun 2011 17:42:08 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Lightning/1.0b3pre Thunderbird/3.1.10 MIME-Version: 1.0 To: Mel Gorman CC: Andrew Morton , =?UTF-8?B?UMOhZHJhaWcgQnJh?= =?UTF-8?B?ZHk=?= , James Bottomley , Colin King , Minchan Kim , Andrew Lutomirski , Johannes Weiner , linux-mm , linux-kernel Subject: Re: [PATCH 3/4] mm: vmscan: Evaluate the watermarks against the correct classzone References: <1308926697-22475-1-git-send-email-mgorman@suse.de> <1308926697-22475-4-git-send-email-mgorman@suse.de> In-Reply-To: <1308926697-22475-4-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 914 Lines: 21 On 06/24/2011 10:44 AM, Mel Gorman wrote: > When deciding if kswapd is sleeping prematurely, the classzone is > taken into account but this is different to what balance_pgdat() and > the allocator are doing. Specifically, the DMA zone will be checked > based on the classzone used when waking kswapd which could be for a > GFP_KERNEL or GFP_HIGHMEM request. The lowmem reserve limit kicks in, > the watermark is not met and kswapd thinks its sleeping prematurely > keeping kswapd awake in error. > > Reported-and-tested-by: Pádraig Brady > Signed-off-by: Mel Gorman Acked-by: Rik van Riel -- All rights reversed -- 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/