Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757297AbYAOW7p (ORCPT ); Tue, 15 Jan 2008 17:59:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752477AbYAOW7h (ORCPT ); Tue, 15 Jan 2008 17:59:37 -0500 Received: from mx1.redhat.com ([66.187.233.31]:49230 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751460AbYAOW7g convert rfc822-to-8bit (ORCPT ); Tue, 15 Jan 2008 17:59:36 -0500 Date: Tue, 15 Jan 2008 17:59:25 -0500 From: Rik van Riel To: "Daniel =?UTF-8?B?U3DDpW5n?=" Cc: "KOSAKI Motohiro" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Marcelo Tosatti" , "Andrew Morton" Subject: Re: [RFC][PATCH 4/5] memory_pressure_notify() caller Message-ID: <20080115175925.215471e1@bree.surriel.com> In-Reply-To: References: <20080115092828.116F.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080115100124.117B.KOSAKI.MOTOHIRO@jp.fujitsu.com> Organization: Red Hat, Inc. X-Mailer: Claws Mail 3.0.2 (GTK+ 2.10.4; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 815 Lines: 20 On Tue, 15 Jan 2008 23:55:17 +0100 "Daniel Spång" wrote: > The notification fires after only ~100 MB allocated, i.e., when page > reclaim is beginning to nag from page cache. Isn't this a bit early? > Repeating the test with swap enabled results in a notification after > ~600 MB allocated, which is more reasonable and just before the system > starts to swap. Your issue may have more to do with the fact that the highmem zone is 128MB in size and some balancing issues between __alloc_pages and try_to_free_pages. -- 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/