Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030417AbVIJFmy (ORCPT ); Sat, 10 Sep 2005 01:42:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932629AbVIJFmy (ORCPT ); Sat, 10 Sep 2005 01:42:54 -0400 Received: from smtp.osdl.org ([65.172.181.4]:36267 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932612AbVIJFmx (ORCPT ); Sat, 10 Sep 2005 01:42:53 -0400 Date: Fri, 9 Sep 2005 22:41:48 -0700 From: Andrew Morton To: awesley@acquerra.com.au Cc: nate.diller@gmail.com, rheflin@atipa.com, linux-kernel@vger.kernel.org Subject: Re: kernel 2.6.13 buffer strangeness Message-Id: <20050909224148.3bf40856.akpm@osdl.org> In-Reply-To: <43222DC3.9080609@acquerra.com.au> References: <432151B0.7030603@acquerra.com.au> <5c49b0ed05090914394dba42bf@mail.gmail.com> <43222DC3.9080609@acquerra.com.au> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 937 Lines: 18 Anthony Wesley wrote: > > How else can it take only 70 seconds to reach 95% dirty when I have 1.3Gb of available RAM and data coming in at 25MBytes/sec and out at 17MBytes/sec? It doesn't make any sense... What architecture? x86? If so then bear in mind that your memory is split into 500MB highmem and 800MB lowmem. The kernel might be starting I/O due to the highmem zone being full of dirty pages. That'd be wrong of it if so - it's supposed to just fall back to lowmem for the page allocations, but that code has changed quite a bit in the two years since I got all that working... You need to run `watch -n1 cat /proc/meminfo' while doing these tests... - 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/