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authorMel Gorman <mgorman@suse.de>2013-10-07 11:28:42 +0100
committerIngo Molnar <mingo@kernel.org>2013-10-29 11:37:05 +0100
commit1dd49bfa3465756b3ce72214b58a33e4afb67aa3 (patch)
tree032b8e8a56615ef6a5e67a8815736f1b31bb151f /mm
parent959f58544b7f20c92d5eb43d1232c96c15c01bfb (diff)
downloadlinux-stericsson-1dd49bfa3465756b3ce72214b58a33e4afb67aa3.tar.gz
mm: numa: Do not account for a hinting fault if we raced
If another task handled a hinting fault in parallel then do not double account for it. Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1381141781-10992-5-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 610e3df2768a..33ee637648ba 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1325,8 +1325,11 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
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);