From: Mel Gorman <mgorman@suse.de>
To: Ingo Molnar <mingo@kernel.org>, Peter Anvin <hpa@zytor.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Steven Noonan <steven@uplinklabs.net>,
Rik van Riel <riel@redhat.com>,
David Vrabel <david.vrabel@citrix.com>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Mel Gorman <mgorman@suse.de>, Linux-X86 <x86@kernel.org>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 2/3] x86: Require x86-64 for automatic NUMA balancing
Date: Tue, 15 Apr 2014 15:41:15 +0100 [thread overview]
Message-ID: <1397572876-1610-3-git-send-email-mgorman@suse.de> (raw)
In-Reply-To: <1397572876-1610-1-git-send-email-mgorman@suse.de>
32-bit support for NUMA is an oddity on its own but with automatic NUMA
balancing on top there is a reasonable risk that the CPUPID information
cannot be stored in the page flags. This patch removes support for
automatic NUMA support on 32-bit x86.
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
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
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next prev parent reply other threads:[~2014-04-15 14:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-15 14:41 [PATCH 0/3] Use an alternative to _PAGE_PROTNONE for _PAGE_NUMA v4 Mel Gorman
2014-04-15 14:41 ` [PATCH 1/3] mm: use paravirt friendly ops for NUMA hinting ptes Mel Gorman
2014-04-15 14:41 ` Mel Gorman [this message]
2014-04-15 14:41 ` [PATCH 3/3] x86: Define _PAGE_NUMA by reusing software bits on the PMD and PTE levels Mel Gorman
2014-04-17 4:11 ` [x86] BUG: Bad page map in process usemem pte:310103e3c pmd:7b3c2a067 Fengguang Wu
2014-04-17 4:19 ` Fengguang Wu
2014-04-17 2:59 ` [PATCH 0/3] Use an alternative to _PAGE_PROTNONE for _PAGE_NUMA v4 Fengguang Wu
2014-04-17 9:06 ` Mel Gorman
2014-04-19 7:46 ` Fengguang Wu
2014-04-22 15:12 ` Mel Gorman
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