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>
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@ -1325,8 +1325,11 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
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check_same:
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spin_lock(&mm->page_table_lock);
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if (unlikely(!pmd_same(pmd, *pmdp)))
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if (unlikely(!pmd_same(pmd, *pmdp))) {
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/* Someone else took our fault */
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current_nid = -1;
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goto out_unlock;
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}
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clear_pmdnuma:
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pmd = pmd_mknonnuma(pmd);
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set_pmd_at(mm, haddr, pmdp, pmd);
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