From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760780Ab3LIHKH (ORCPT ); Mon, 9 Dec 2013 02:10:07 -0500 Received: from cantor2.suse.de ([195.135.220.15]:40154 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760614Ab3LIHJW (ORCPT ); Mon, 9 Dec 2013 02:09:22 -0500 From: Mel Gorman To: Andrew Morton Cc: Alex Thorlton , Rik van Riel , Linux-MM , LKML , Mel Gorman Subject: [PATCH 08/18] sched: numa: Skip inaccessible VMAs Date: Mon, 9 Dec 2013 07:09:02 +0000 Message-Id: <1386572952-1191-9-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1386572952-1191-1-git-send-email-mgorman@suse.de> References: <1386572952-1191-1-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Inaccessible VMA should not be trapping NUMA hint faults. Skip them. Cc: stable@vger.kernel.org Signed-off-by: Mel Gorman --- kernel/sched/fair.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e8b652e..1ce1615 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1752,6 +1752,13 @@ void task_numa_work(struct callback_head *work) (vma->vm_file && (vma->vm_flags & (VM_READ|VM_WRITE)) == (VM_READ))) continue; + /* + * Skip inaccessible VMAs to avoid any confusion between + * PROT_NONE and NUMA hinting ptes + */ + if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE))) + continue; + do { start = max(start, vma->vm_start); end = ALIGN(start + (pages << PAGE_SHIFT), HPAGE_SIZE); -- 1.8.4