From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757442Ab1GKIei (ORCPT ); Mon, 11 Jul 2011 04:34:38 -0400 Received: from mail-bw0-f46.google.com ([209.85.214.46]:42508 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757371Ab1GKIeg (ORCPT ); Mon, 11 Jul 2011 04:34:36 -0400 Date: Mon, 11 Jul 2011 10:34:32 +0200 From: Tejun Heo To: "H. Peter Anvin" Cc: Ingo Molnar , Thomas Gleixner , Conny Seidel , x86@kernel.org, linux-kernel@vger.kernel.org, Hans Rosenfeld Subject: [PATCH x86/urgent] x86: Disable AMD_NUMA for 32bit for now Message-ID: <20110711083432.GC943@htj.dyndns.org> References: <20110621174131.054f0422.conny.seidel_amd.com@marah.osrc.amd.com> <20110626102235.GC12200@mtj.dyndns.org> <20110626223807.47cef5c6.conny.seidel_amd.com@marah.osrc.amd.com> <20110628174613.GP478@escobedo.osrc.amd.com> <20110629094451.GJ3386@htj.dyndns.org> <20110701162239.GX3386@htj.dyndns.org> <20110701162327.GY3386@htj.dyndns.org> <20110709083206.GB943@htj.dyndns.org> <4E181477.5090405@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4E181477.5090405@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit 2706a0bf7b "x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit too" enabled AMD NUMA for 32bit too. Unfortunately, SPARSEMEM on 32bit had rather coarse (512MiB) addr->node mapping granularity due to lack of space in page->flags. This led to boot failure on certain AMD NUMA machines which had 128MiB alignment on nodes. Patches to properly detect this condition and reject NUMA configuration are posted[1] but deemed too pervasive for merge at this point (-rc6). Disable AMD NUMA for 32bit for now and re-enable once the detection logic is merged. [1] http://thread.gmane.org/gmane.linux.kernel/1161279/focus=1162583 Signed-off-by: Tejun Heo Reported-by: Hans Rosenfeld --- arch/x86/Kconfig | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index da34972..37357a5 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1170,7 +1170,7 @@ comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" config AMD_NUMA def_bool y prompt "Old style AMD Opteron NUMA detection" - depends on NUMA && PCI + depends on X86_64 && NUMA && PCI ---help--- Enable AMD NUMA node topology detection. You should say Y here if you have a multi processor AMD system. This uses an old method to -- 1.7.6