Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263599AbUD2GdF (ORCPT ); Thu, 29 Apr 2004 02:33:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263604AbUD2GdF (ORCPT ); Thu, 29 Apr 2004 02:33:05 -0400 Received: from holomorphy.com ([207.189.100.168]:64385 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S263599AbUD2GdC (ORCPT ); Thu, 29 Apr 2004 02:33:02 -0400 Date: Wed, 28 Apr 2004 23:31:53 -0700 From: William Lee Irwin III To: Benjamin Herrenschmidt Cc: Paul Mackerras , Andrew Morton , brettspamacct@fastclick.com, Jeff Garzik , Linux Kernel list Subject: Re: ~500 megs cached yet 2.6.5 goes into swap hell Message-ID: <20040429063153.GG737@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Benjamin Herrenschmidt , Paul Mackerras , Andrew Morton , brettspamacct@fastclick.com, Jeff Garzik , Linux Kernel list References: <409021D3.4060305@fastclick.com> <20040428170106.122fd94e.akpm@osdl.org> <409047E6.5000505@pobox.com> <40905127.3000001@fastclick.com> <20040428180038.73a38683.akpm@osdl.org> <16528.23219.17557.608276@cargo.ozlabs.ibm.com> <20040428185342.0f61ed48.akpm@osdl.org> <20040428194039.4b1f5d40.akpm@osdl.org> <16528.28485.996662.598051@cargo.ozlabs.ibm.com> <1083219158.20089.128.camel@gaston> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1083219158.20089.128.camel@gaston> User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 902 Lines: 20 At some point in the past, I wrote: >> The really strange thing is that the behaviour seems to get worse the >> more RAM you have. I haven't noticed any problem at all on my laptop >> with 768MB, only on the G5, which has 2.5GB. (The laptop is still on >> 2.6.2-rc3 though, so I will try a newer kernel on it.) On Thu, Apr 29, 2004 at 04:12:38PM +1000, Benjamin Herrenschmidt wrote: > Your G5 also has a 2Gb IO hole in the middle of zone DMA, it's possible > that the accounting doesn't work properly. Hmm, ->present_pages vs. ->spanned_pages distinction(s) should cover this, or should have at one point. How are those being set at the moment? -- wli - 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/