From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756308Ab3JIRZX (ORCPT ); Wed, 9 Oct 2013 13:25:23 -0400 Received: from terminus.zytor.com ([198.137.202.10]:55896 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756261Ab3JIRZR (ORCPT ); Wed, 9 Oct 2013 13:25:17 -0400 Date: Wed, 9 Oct 2013 10:24:33 -0700 From: tip-bot for Mel Gorman Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, hannes@cmpxchg.org, riel@redhat.com, aarcange@redhat.com, srikar@linux.vnet.ibm.com, mgorman@suse.de, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, peterz@infradead.org, hannes@cmpxchg.org, riel@redhat.com, aarcange@redhat.com, srikar@linux.vnet.ibm.com, mgorman@suse.de, tglx@linutronix.de In-Reply-To: <1381141781-10992-5-git-send-email-mgorman@suse.de> References: <1381141781-10992-5-git-send-email-mgorman@suse.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] mm: numa: Do not account for a hinting fault if we raced Git-Commit-ID: 0c3a775e1e0b069bf765f8355b723ce0d18dcc6c X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (terminus.zytor.com [127.0.0.1]); Wed, 09 Oct 2013 10:24:39 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 0c3a775e1e0b069bf765f8355b723ce0d18dcc6c Gitweb: http://git.kernel.org/tip/0c3a775e1e0b069bf765f8355b723ce0d18dcc6c Author: Mel Gorman AuthorDate: Mon, 7 Oct 2013 11:28:42 +0100 Committer: Ingo Molnar 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 Reviewed-by: Rik van Riel Cc: Andrea Arcangeli Cc: Johannes Weiner Cc: Srikar Dronamraju Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1381141781-10992-5-git-send-email-mgorman@suse.de Signed-off-by: Ingo Molnar --- 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);