From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f170.google.com (mail-wi0-f170.google.com [209.85.212.170]) by kanga.kvack.org (Postfix) with ESMTP id 24EAE6B0036 for ; Mon, 7 Apr 2014 11:10:51 -0400 (EDT) Received: by mail-wi0-f170.google.com with SMTP id bs8so6342101wib.5 for ; Mon, 07 Apr 2014 08:10:50 -0700 (PDT) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id h9si6352935wjb.42.2014.04.07.08.10.49 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 07 Apr 2014 08:10:49 -0700 (PDT) From: Mel Gorman 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> In-Reply-To: <1396883443-11696-1-git-send-email-mgorman@suse.de> References: <1396883443-11696-1-git-send-email-mgorman@suse.de> Sender: owner-linux-mm@kvack.org List-ID: 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 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org