Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755641AbaAMQXl (ORCPT ); Mon, 13 Jan 2014 11:23:41 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:53557 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752798AbaAMQEY (ORCPT ); Mon, 13 Jan 2014 11:04:24 -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 3.11 151/208] mm: numa: clear numa hinting information on mprotect Date: Mon, 13 Jan 2014 15:59:52 +0000 Message-Id: <1389628849-1614-152-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 1667918b6483b12a6496bf54151b827b8235d7b1 upstream. On a protection change it is no longer clear if the page should be still accessible. This patch clears the NUMA hinting fault bits on a protection change. 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 --- mm/huge_memory.c | 2 ++ mm/mprotect.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 0db1517..1385bf9 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1495,6 +1495,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, pmd_t entry; if (!prot_numa) { entry = pmdp_get_and_clear(mm, addr, pmd); + if (pmd_numa(entry)) + entry = pmd_mknonnuma(entry); entry = pmd_modify(entry, newprot); BUG_ON(pmd_write(entry)); set_pmd_at(mm, addr, pmd, entry); diff --git a/mm/mprotect.c b/mm/mprotect.c index 3277121..00edb75 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -56,6 +56,8 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, if (!prot_numa) { ptent = ptep_modify_prot_start(mm, addr, pte); + if (pte_numa(ptent)) + ptent = pte_mknonnuma(ptent); ptent = pte_modify(ptent, newprot); updated = true; } else { -- 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/