Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751335Ab3IJJco (ORCPT ); Tue, 10 Sep 2013 05:32:44 -0400 Received: from cantor2.suse.de ([195.135.220.15]:56996 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751065Ab3IJJci (ORCPT ); Tue, 10 Sep 2013 05:32:38 -0400 From: Mel Gorman To: Peter Zijlstra , Rik van Riel Cc: Srikar Dronamraju , Ingo Molnar , Andrea Arcangeli , Johannes Weiner , Linux-MM , LKML , 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 Message-Id: <1378805550-29949-5-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1378805550-29949-1-git-send-email-mgorman@suse.de> References: <1378805550-29949-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 977 Lines: 33 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/