From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754230AbaE1IAI (ORCPT ); Wed, 28 May 2014 04:00:08 -0400 Received: from mail-lb0-f180.google.com ([209.85.217.180]:51698 "EHLO mail-lb0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751984AbaE1IAF (ORCPT ); Wed, 28 May 2014 04:00:05 -0400 Subject: [PATCH] mm: dont call mmu_notifier_invalidate_page during munlock From: Konstantin Khlebnikov To: linux-mm@kvack.org, Andrew Morton Cc: linux-kernel@vger.kernel.org Date: Wed, 28 May 2014 11:59:55 +0400 Message-ID: <20140528075955.20300.22758.stgit@zurg> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org try_to_munlock() searches other mlocked vmas, it never unmaps pages. There is no reason for invalidation because ptes are left unchanged. Signed-off-by: Konstantin Khlebnikov --- mm/rmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index 9c3e773..75d9d5c 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1225,7 +1225,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, out_unmap: pte_unmap_unlock(pte, ptl); - if (ret != SWAP_FAIL) + if (ret != SWAP_FAIL && TTU_ACTION(flags) != TTU_MUNLOCK) mmu_notifier_invalidate_page(mm, address); out: return ret;