This is a note to let you know that I've just added the patch titled
mm: numa: Do not account for a hinting fault if we raced
to the 3.11-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-numa-do-not-account-for-a-hinting-fault-if-we-raced.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1dd49bfa3465756b3ce72214b58a33e4afb67aa3 Mon Sep 17 00:00:00 2001
From: Mel Gorman <mgorman@xxxxxxx>
Date: Mon, 7 Oct 2013 11:28:42 +0100
Subject: mm: numa: Do not account for a hinting fault if we raced
From: Mel Gorman <mgorman@xxxxxxx>
commit 1dd49bfa3465756b3ce72214b58a33e4afb67aa3 upstream.
If another task handled a hinting fault in parallel then do not double
account for it.
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/1381141781-10992-5-git-send-email-mgorman@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1337,8 +1337,11 @@ int do_huge_pmd_numa_page(struct mm_stru
check_same:
spin_lock(&mm->page_table_lock);
- if (unlikely(!pmd_same(pmd, *pmdp)))
+ if (unlikely(!pmd_same(pmd, *pmdp))) {
+ /* Someone else took our fault */
+ current_nid = -1;
goto out_unlock;
+ }
clear_pmdnuma:
pmd = pmd_mknonnuma(pmd);
set_pmd_at(mm, haddr, pmdp, pmd);
Patches currently in stable-queue which might be from mgorman@xxxxxxx are
queue-3.11/mm-wait-for-thp-migrations-to-complete-during-numa-hinting-faults.patch
queue-3.11/mm-account-for-a-thp-numa-hinting-update-as-one-pte-update.patch
queue-3.11/mm-prevent-parallel-splits-during-thp-migration.patch
queue-3.11/mm-close-races-between-thp-migration-and-pmd-numa-clearing.patch
queue-3.11/mm-numa-do-not-account-for-a-hinting-fault-if-we-raced.patch
queue-3.11/mm-numa-sanitize-task_numa_fault-callsites.patch
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