Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755672AbaAMQYJ (ORCPT ); Mon, 13 Jan 2014 11:24:09 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:53551 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754333AbaAMQEX (ORCPT ); Mon, 13 Jan 2014 11:04:23 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Mel Gorman , Alex Thorlton , Andrew Morton , Linus Torvalds , Luis Henriques Subject: [PATCH 3.11 150/208] sched: numa: skip inaccessible VMAs Date: Mon, 13 Jan 2014 15:59:51 +0000 Message-Id: <1389628849-1614-151-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1389628849-1614-1-git-send-email-luis.henriques@canonical.com> References: <1389628849-1614-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Mel Gorman commit 3c67f474558748b604e247d92b55dfe89654c81d upstream. Inaccessible VMA should not be trapping NUMA hint faults. Skip them. Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel Cc: Alex Thorlton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Luis Henriques --- kernel/sched/fair.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 66dae75..a07a479 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -974,6 +974,13 @@ void task_numa_work(struct callback_head *work) if (vma->vm_end - vma->vm_start < HPAGE_SIZE) 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); -- 1.8.3.2 -- 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/