From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753265Ab3LCIwT (ORCPT ); Tue, 3 Dec 2013 03:52:19 -0500 Received: from cantor2.suse.de ([195.135.220.15]:49445 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753092Ab3LCIwM (ORCPT ); Tue, 3 Dec 2013 03:52:12 -0500 From: Mel Gorman To: Alex Thorlton Cc: Rik van Riel , Linux-MM , LKML , Mel Gorman Subject: [PATCH 11/15] sched: numa: Skip inaccessible VMAs Date: Tue, 3 Dec 2013 08:51:58 +0000 Message-Id: <1386060721-3794-12-git-send-email-mgorman@suse.de> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1386060721-3794-1-git-send-email-mgorman@suse.de> References: <1386060721-3794-1-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. 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 7c70201..40d8ea3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -970,6 +970,13 @@ void task_numa_work(struct callback_head *work) if (!vma_migratable(vma)) 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; + /* Skip small VMAs. They are not likely to be of relevance */ if (vma->vm_end - vma->vm_start < HPAGE_SIZE) continue; -- 1.8.4