From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933220AbYD1JS5 (ORCPT ); Mon, 28 Apr 2008 05:18:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1765100AbYD1JSp (ORCPT ); Mon, 28 Apr 2008 05:18:45 -0400 Received: from fg-out-1718.google.com ([72.14.220.154]:8273 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759014AbYD1JSn (ORCPT ); Mon, 28 Apr 2008 05:18:43 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=KkNpYBnICMuS3oEcm9K711HQdeM7j6rQxDb4qzJwQGUpW/6wxOrE4hFgWKZ/E7VeEpt0j0dXPu2HWESspoXqe/TA4VbPt9vJ/qpUxfU8O66nM2IMbmkjBi9+FF0caKhWm0ZQQ19vtqbiw8FS+YpGrO5+w4nIjowzqyQz2oSM8ZE= Message-ID: <48159668.5010808@googlemail.com> Date: Mon, 28 Apr 2008 11:18:32 +0200 From: Gabriel C User-Agent: Thunderbird 2.0.0.12 (X11/20080227) MIME-Version: 1.0 To: Yinghai Lu CC: Andrew Morton , Ingo Molnar , "H. Peter Anvin" , LKML , Jesse Barnes , Mika Fischer , balajirrao@gmail.com, Andi Kleen Subject: Re: [PATCH] x86_32: trim memory by updating e820 v3 References: <200801192045.17291.yinghai.lu@sun.com> <200801202256.48365.yinghai.lu@sun.com> <20080122165125.GA17992@elte.hu> <200801221623.20861.yinghai.lu@sun.com> <20080426035614.a30afb17.akpm@linux-foundation.org> <48132665.8050202@googlemail.com> <86802c440804272344yac6a9f0n40809169424247e6@mail.gmail.com> In-Reply-To: <86802c440804272344yac6a9f0n40809169424247e6@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yinghai Lu wrote: > On Sat, Apr 26, 2008 at 5:56 AM, Gabriel C wrote: >> Andrew Morton wrote: >> > On Tue, 22 Jan 2008 16:23:20 -0800 Yinghai Lu wrote: >> > >> >> [PATCH] x86_32: trim memory by updating e820 v3 >> >> >> >> when mtrr is not covering all e820 table, need to trim the ram, need to update e820 >> >> >> >> reuse some code for x86_64 >> >> >> >> here need to add early_get_cap and use it in early_cpu_detect, and move mtrr_bp_init early >> >> >> >> need Justine to test with his special system with bug bios. >> >> >> >> Signed-off-by: Yinghai Lu >> > >> > Speaking of mtrr and e820.... >> > >> > Could someone please take a peek at >> > http://bugzilla.kernel.org/show_bug.cgi?id=10508 ? >> > >> > For some reason we seem to have turned this: >> > >> > [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f800 (usable) >> > [ 0.000000] BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved) >> > [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bf6d0000 (usable) >> > [ 0.000000] BIOS-e820: 00000000bf6d0000 - 00000000bf6e3000 (ACPI NVS) >> > [ 0.000000] BIOS-e820: 00000000bf6e3000 - 00000000c0000000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved) >> > [ 0.000000] BIOS-e820: 00000000fed14000 - 00000000fed1a000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) >> > [ 0.000000] BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) >> > [ 0.000000] BIOS-e820: 0000000100000000 - 0000000140000000 (usable) >> > >> > into this: >> > >> > reg00: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1 >> > reg01: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 >> > reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1 >> > reg03: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1 >> > reg04: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1 >> > >> > which screws up the X server's attempt to map the video memory at >> > 0xd0000000. >> >> I see that on my box with ASUS P5E-VM DO and 4G RAM. >> It has an Q35 intel chipset and the intel card is set to use 256MB in BIOS. >> >> I tested 2.6.{24*,25,25-next,25-latest-git} 32/64 bit. >> >> Also I get the mtrr type mismatch message on 32 and 64 bit kernels. >> >> ... >> >> [ 0.000000] BIOS-provided physical RAM map: >> [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009ec00 (usable) >> [ 0.000000] BIOS-e820: 000000000009ec00 - 00000000000a0000 (reserved) >> [ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved) >> [ 0.000000] BIOS-e820: 0000000000100000 - 00000000cf550000 (usable) >> [ 0.000000] BIOS-e820: 00000000cf550000 - 00000000cf55e000 (ACPI data) >> [ 0.000000] BIOS-e820: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS) >> [ 0.000000] BIOS-e820: 00000000cf5e0000 - 00000000cf600000 (reserved) >> >> [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) >> [ 0.000000] BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved) >> [ 0.000000] BIOS-e820: 0000000100000000 - 000000012c000000 (usable) >> ... >> >> cat /proc/mtrr : >> >> reg00: base=0xd0000000 (3328MB), size= 256MB: uncachable, count=1 >> reg01: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1 >> reg02: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1 >> reg03: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 >> reg04: base=0x120000000 (4608MB), size= 128MB: write-back, count=1 >> reg05: base=0x128000000 (4736MB), size= 64MB: write-back, count=1 >> reg06: base=0xcf600000 (3318MB), size= 2MB: uncachable, count=1 > > please try the patch at > > http://lkml.org/lkml/2008/4/28/52 > > with mtrr_chunk_size=1g Hi, With mtrr_chunk_size=1g my box won't boot :( ( just tested 64bit kernel ). It does without but I get a warning: ... [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009cc00 (usable) [ 0.000000] BIOS-e820: 000000000009cc00 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 00000000cf550000 (usable) [ 0.000000] BIOS-e820: 00000000cf550000 - 00000000cf55e000 (ACPI data) [ 0.000000] BIOS-e820: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS) [ 0.000000] BIOS-e820: 00000000cf5e0000 - 00000000cf600000 (reserved) [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) [ 0.000000] BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved) [ 0.000000] BIOS-e820: 0000000100000000 - 000000012c000000 (usable) [ 0.000000] Entering add_active_range(0, 0, 156) 0 entries of 256 used [ 0.000000] Entering add_active_range(0, 256, 849232) 1 entries of 256 used [ 0.000000] Entering add_active_range(0, 1048576, 1228800) 2 entries of 256 used [ 0.000000] max_pfn_mapped = 1228800 [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 [ 0.000000] After WB checking [ 0.000000] MTRR MAP PFN: 0000000000000000 - 0000000000100000 [ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000120000 [ 0.000000] MTRR MAP PFN: 0000000000120000 - 0000000000128000 [ 0.000000] MTRR MAP PFN: 0000000000128000 - 000000000012c000 [ 0.000000] After UC checking [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600 [ 0.000000] MTRR MAP PFN: 0000000000100001 - 0000000000120000 [ 0.000000] MTRR MAP PFN: 0000000000120000 - 0000000000128000 [ 0.000000] MTRR MAP PFN: 0000000000128000 - 000000000012c000 [ 0.000000] MTRR MAP PFN: 00000000000cf801 - 00000000000d0000 [ 0.000000] After sorting [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600 [ 0.000000] MTRR MAP PFN: 00000000000cf801 - 00000000000d0000 [ 0.000000] MTRR MAP PFN: 0000000000100001 - 0000000000120000 [ 0.000000] MTRR MAP PFN: 0000000000120000 - 0000000000128000 [ 0.000000] MTRR MAP PFN: 0000000000128000 - 000000000012c000 [ 0.000000] rangeX: 0000000000000000 - 00000000d0000000 [ 0.000000] Setting variable MTRR 0, base: 0MB, range: 2048MB, type WB [ 0.000000] Setting variable MTRR 1, base: 2048MB, range: 1024MB, type WB [ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 256MB, type WB [ 0.000000] range0: 00000000cf801000 - 00000000cf801000 [ 0.000000] range: 00000000cf801000 - 00000000d0000000 [ 0.000000] Setting variable MTRR 3, base: 3320MB, range: 0MB, type WB [ 0.000000] Setting variable MTRR 4, base: 3320MB, range: 0MB, type WB [ 0.000000] Setting variable MTRR 5, base: 3320MB, range: 0MB, type WB [ 0.000000] Setting variable MTRR 6, base: 3320MB, range: 0MB, type WB [ 0.000000] Setting variable MTRR 7, base: 3320MB, range: 0MB, type WB [ 0.000000] range0: 0000000100001000 - 0000000110001000 [ 0.000000] range: 0000000110001000 - 0000000120001000 [ 0.000000] hole: 0000000120000000 - 0000000120001000 [ 0.000000] DONE variable MTRRs [ 0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106 [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 1472MB of RAM. [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1049 mtrr_trim_uncached_memory+0x154/0x18d() [ 0.000000] Modules linked in: [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.25-05561-g064922a-dirty #797 [ 0.000000] [ 0.000000] Call Trace: [ 0.000000] [] warn_on_slowpath+0x64/0xb0 [ 0.000000] [] mtrr_trim_uncached_memory+0x154/0x18d [ 0.000000] [] setup_arch+0x356/0x599 [ 0.000000] [] start_kernel+0x5c/0x3b9 [ 0.000000] [] x86_64_start_kernel+0x225/0x270 [ 0.000000] [ 0.000000] ---[ end trace ca143223eefdc828 ]--- [ 0.000000] update e820 for mtrr [ 0.000000] modified physical RAM map: [ 0.000000] modified: 0000000000000000 - 000000000009cc00 (usable) [ 0.000000] modified: 000000000009cc00 - 00000000000a0000 (reserved) [ 0.000000] modified: 00000000000e4000 - 0000000000100000 (reserved) [ 0.000000] modified: 0000000000100000 - 00000000cf550000 (usable) [ 0.000000] modified: 00000000cf550000 - 00000000cf55e000 (ACPI data) [ 0.000000] modified: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS) [ 0.000000] modified: 00000000cf5e0000 - 00000000cf600000 (reserved) [ 0.000000] modified: 00000000fee00000 - 00000000fee01000 (reserved) [ 0.000000] modified: 00000000ffc00000 - 000000012c000000 (reserved) [ 0.000000] Entering add_active_range(0, 0, 156) 3 entries of 256 used [ 0.000000] Entering add_active_range(0, 256, 849232) 3 entries of 256 used [ 0.000000] max_pfn_mapped = 1228800 [ 0.000000] init_memory_mapping ... --($:~)-- cat /proc/mtrr reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1 reg03: base=0xcf801000 (3320MB), size= 4KB: write-back, count=1 reg04: base=0xcf802000 (3320MB), size= 8KB: write-back, count=1 reg05: base=0xcf804000 (3320MB), size= 16KB: write-back, count=1 reg06: base=0xcf808000 (3320MB), size= 32KB: write-back, count=1 reg07: base=0xcf810000 (3320MB), size= 64KB: write-back, count=1 --($:~)-- uname -a Linux thor 2.6.25-05561-g064922a-dirty #797 SMP PREEMPT Mon Apr 28 10:30:06 CEST 2008 x86_64 GNU/Linux Full dmesg can be found there : http://frugalware.org/~crazy/mtrr/mtrr_dmesg > > YH > Gabriel