Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755501AbYJBW6Z (ORCPT ); Thu, 2 Oct 2008 18:58:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753570AbYJBW6Q (ORCPT ); Thu, 2 Oct 2008 18:58:16 -0400 Received: from smtp.ono.com ([62.42.230.12]:34341 "EHLO resmaa01.ono.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752544AbYJBW6Q convert rfc822-to-8bit (ORCPT ); Thu, 2 Oct 2008 18:58:16 -0400 Date: Fri, 3 Oct 2008 00:58:07 +0200 From: "J.A. =?UTF-8?B?TWFnYWxsw7Nu?=" To: Linux-Kernel Subject: Re: [PATCH 2/2] x86: mtrr_cleanup try gran_size to less than 1M Message-ID: <20081003005807.7d2b2b43@werewolf.home> In-Reply-To: <86802c440810021533v572975e8n40e55009cc2b2d8a@mail.gmail.com> References: <1222739652-17169-1-git-send-email-yhlu.kernel@gmail.com> <1222739652-17169-2-git-send-email-yhlu.kernel@gmail.com> <20081003000314.771b2f68@werewolf.home> <86802c440810021533v572975e8n40e55009cc2b2d8a@mail.gmail.com> X-Mailer: Claws Mail 3.5.0cvs144 (GTK+ 2.14.3; i686-pc-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: 2287 Lines: 59 On Thu, 2 Oct 2008 15:33:10 -0700, "Yinghai Lu" wrote: > On Thu, Oct 2, 2008 at 3:03 PM, J.A. Magallón wrote: > > On Mon, 29 Sep 2008 18:54:12 -0700, Yinghai Lu wrote: > > > >> > >> so start from 64k instead of 1M > >> > > > > Or there is something I don't catch about mtrrs, or it still does silly > > things. > > > > I have an ASUS PCDL, dual xeon, 2Gb of memory. Mtrrs after cleanup are: > > > > werewolf:/proc> cat mtrr > > reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 > > reg01: base=0x40000000 (1024MB), size= 512MB: write-back, count=1 > > reg02: base=0x60000000 (1536MB), size= 256MB: write-back, count=1 > > reg03: base=0x70000000 (1792MB), size= 128MB: write-back, count=1 > > reg04: base=0x78000000 (1920MB), size= 64MB: write-back, count=1 > > reg05: base=0x7c000000 (1984MB), size= 64MB: write-back, count=1 > > reg06: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 > > > > So it adds a last WB zone, but substracts the last 1Mb. (Why do > > I have that stupid uncacheable mb ? probably a bios issue...) > > But those two 64 mb zones could be add to a 128Mb, that new one > > with previous to 256Mb and so on, giving something like: > > > > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > > reg01: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 > > > > Is this incorrect ? > > > > can you boot with mtrr_cleanup_debug? > I don't have such option in my kernel, this is -rc8-git3. > also what is /proc/mtrr with disable_mtrr_cleanup? > > Yeah, it goes right on the Xeon: reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 Will try your patch now. -- J.A. Magallon \ Software is like sex: \ It's better when it's free Mandriva Linux release 2009.0 (Cooker) for i586 Linux 2.6.25-jam18 (gcc 4.3.1 20080626 (GCC) #1 SMP -- 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/