| From | Mel Gorman <> | Subject | [PATCH 04/50] mm: numa: Do not account for a hinting fault if we raced | Date | Tue, 10 Sep 2013 10:31:44 +0100 |
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If another task handled a hinting fault in parallel then do not double account for it.
Not-signed-off-by: Peter Zijlstra --- mm/huge_memory.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 860a368..5c37cd2 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1337,8 +1337,11 @@ 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); -- 1.8.1.4
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