Patch "mm: Account for a THP NUMA hinting update as one PTE update" has been added to the 3.10-stable tree

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This is a note to let you know that I've just added the patch titled

    mm: Account for a THP NUMA hinting update as one PTE update

to the 3.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mm-account-for-a-thp-numa-hinting-update-as-one-pte-update.patch
and it can be found in the queue-3.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 0255d491848032f6c601b6410c3b8ebded3a37b1 Mon Sep 17 00:00:00 2001
From: Mel Gorman <mgorman@xxxxxxx>
Date: Mon, 7 Oct 2013 11:28:47 +0100
Subject: mm: Account for a THP NUMA hinting update as one PTE update

From: Mel Gorman <mgorman@xxxxxxx>

commit 0255d491848032f6c601b6410c3b8ebded3a37b1 upstream.

A THP PMD update is accounted for as 512 pages updated in vmstat.  This is
large difference when estimating the cost of automatic NUMA balancing and
can be misleading when comparing results that had collapsed versus split
THP. This patch addresses the accounting issue.

Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1381141781-10992-10-git-send-email-mgorman@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 mm/mprotect.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -145,7 +145,7 @@ static inline unsigned long change_pmd_r
 				split_huge_page_pmd(vma, addr, pmd);
 			else if (change_huge_pmd(vma, pmd, addr, newprot,
 						 prot_numa)) {
-				pages += HPAGE_PMD_NR;
+				pages++;
 				continue;
 			}
 			/* fall through */


Patches currently in stable-queue which might be from mgorman@xxxxxxx are

queue-3.10/mm-wait-for-thp-migrations-to-complete-during-numa-hinting-faults.patch
queue-3.10/mm-account-for-a-thp-numa-hinting-update-as-one-pte-update.patch
queue-3.10/mm-prevent-parallel-splits-during-thp-migration.patch
queue-3.10/mm-close-races-between-thp-migration-and-pmd-numa-clearing.patch
queue-3.10/mm-numa-do-not-account-for-a-hinting-fault-if-we-raced.patch
queue-3.10/mm-numa-sanitize-task_numa_fault-callsites.patch
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