+ x86-require-x86-64-for-automatic-numa-balancing.patch added to -mm tree

+ x86-require-x86-64-for-automatic-numa-balancing.patch added to -mm tree

[akpm]

Subject: + x86-require-x86-64-for-automatic-numa-balancing.patch added to -mm tree
To: mgorman@suse.de,aarcange@redhat.com,dave.hansen@intel.com,david.vrabel@citrix.com,fengguang.wu@intel.com,gorcunov@gmail.com,hpa@zytor.com,mingo@kernel.org,peterz@infradead.org,riel@redhat.com,srikar@linux.vnet.ibm.com,steven@uplinklabs.net,torvalds@linux-foundation.org
From: akpm@linux-foundation.org
Date: Tue, 15 Apr 2014 13:17:32 -0700


The patch titled
     Subject: x86: require x86-64 for automatic NUMA balancing
has been added to the -mm tree.  Its filename is
     x86-require-x86-64-for-automatic-numa-balancing.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/x86-require-x86-64-for-automatic-numa-balancing.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/x86-require-x86-64-for-automatic-numa-balancing.patch

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------------------------------------------------------
From: Mel Gorman <mgorman@suse.de>
Subject: x86: require x86-64 for automatic NUMA balancing

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>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Noonan <steven@uplinklabs.net>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/x86/Kconfig~x86-require-x86-64-for-automatic-numa-balancing arch/x86/Kconfig
--- a/arch/x86/Kconfig~x86-require-x86-64-for-automatic-numa-balancing
+++ a/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
_

Patches currently in -mm which might be from mgorman@suse.de are

mm-use-paravirt-friendly-ops-for-numa-hinting-ptes.patch
x86-require-x86-64-for-automatic-numa-balancing.patch
x86-define-_page_numa-by-reusing-software-bits-on-the-pmd-and-pte-levels.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
mm-compactionc-isolate_freepages_block-small-tuneup.patch
mm-only-force-scan-in-reclaim-when-none-of-the-lrus-are-big-enough.patch
do_shared_fault-check-that-mmap_sem-is-held.patch