Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755797AbaDGPLD (ORCPT ); Mon, 7 Apr 2014 11:11:03 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50824 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755759AbaDGPKu (ORCPT ); Mon, 7 Apr 2014 11:10:50 -0400 From: Mel Gorman To: Linus Torvalds Cc: Cyrill Gorcunov , Mel Gorman , Peter Anvin , Ingo Molnar , Steven Noonan , Rik van Riel , David Vrabel , Andrew Morton , Peter Zijlstra , Andrea Arcangeli , Linux-MM , Linux-X86 , LKML Subject: [PATCH 1/3] x86: Require x86-64 for automatic NUMA balancing Date: Mon, 7 Apr 2014 16:10:41 +0100 Message-Id: <1396883443-11696-2-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.8.4.5 In-Reply-To: <1396883443-11696-1-git-send-email-mgorman@suse.de> References: <1396883443-11696-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Automatic NUMA balancing currently depends on reusing the PROT_NONE bit which has caused problems on Xen. In preparation for using one of the unused physical address bits this patch requires x86-64 for automatic NUMA balancing. 32-bit support for NUMA on x86 is no longer interesting and the loss of automatic NUMA balancing support should be no surprise. Signed-off-by: Mel Gorman --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0af5250..084b1c1 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -26,7 +26,7 @@ config X86 select ARCH_MIGHT_HAVE_PC_SERIO select HAVE_AOUT if X86_32 select HAVE_UNSTABLE_SCHED_CLOCK - select ARCH_SUPPORTS_NUMA_BALANCING + select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 select ARCH_SUPPORTS_INT128 if X86_64 select ARCH_WANTS_PROT_NUMA_PROT_NONE select HAVE_IDE -- 1.8.4.5 -- 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/