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Date: Wed, 9 Oct 2013 10:24:33 -0700 From: tip-bot for Mel Gorman <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org, peterz@...radead.org, hannes@...xchg.org, riel@...hat.com, aarcange@...hat.com, srikar@...ux.vnet.ibm.com, mgorman@...e.de, tglx@...utronix.de Subject: [tip:sched/core] mm: numa: Do not account for a hinting fault if we raced Commit-ID: 0c3a775e1e0b069bf765f8355b723ce0d18dcc6c Gitweb: http://git.kernel.org/tip/0c3a775e1e0b069bf765f8355b723ce0d18dcc6c Author: Mel Gorman <mgorman@...e.de> AuthorDate: Mon, 7 Oct 2013 11:28:42 +0100 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Wed, 9 Oct 2013 12:39:40 +0200 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@...e.de> Reviewed-by: Rik van Riel <riel@...hat.com> Cc: Andrea Arcangeli <aarcange@...hat.com> Cc: Johannes Weiner <hannes@...xchg.org> Cc: Srikar Dronamraju <srikar@...ux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@...radead.org> Link: http://lkml.kernel.org/r/1381141781-10992-5-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar <mingo@...nel.org> --- 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 19dbb08..dab2bab 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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