From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261648AbTJOAgM (ORCPT ); Tue, 14 Oct 2003 20:36:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261974AbTJOAgM (ORCPT ); Tue, 14 Oct 2003 20:36:12 -0400 Received: from dyn-ctb-210-9-246-230.webone.com.au ([210.9.246.230]:31492 "EHLO chimp.local.net") by vger.kernel.org with ESMTP id S261648AbTJOAgL (ORCPT ); Tue, 14 Oct 2003 20:36:11 -0400 Message-ID: <3F8C966F.5080109@cyberone.com.au> Date: Wed, 15 Oct 2003 10:35:59 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030827 Debian/1.4-3 X-Accept-Language: en MIME-Version: 1.0 To: William Lee Irwin III CC: linux-kernel@vger.kernel.org Subject: Re: mem=16MB laptop testing References: <20031014105514.GH765@holomorphy.com> In-Reply-To: <20031014105514.GH765@holomorphy.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org William Lee Irwin III wrote: >So I tried mem=16m on my laptop (stinkpad T21). I made the following >potentially useless observations: > snip > >inode_cache 840K 840K 100.00% >dentry_cache 746K 753K 99.07% >ext3_inode_cache 591K 592K 99.84% >size-4096 504K 504K 100.00% >size-512 203K 204K 99.75% >size-2048 182K 204K 89.22% >pgd 188K 188K 100.00% >task_struct 100K 108K 92.86% >vm_area_struct 93K 101K 92.28% >blkdev_requests 101K 101K 100.00% > Hmm blkdev_requests looks big. 4 struct requests are allocated for every queue, which totals about 600 bytes. What does /sys/block and the blkdev_requests line from /proc/slabinfo look like?