From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753238Ab3ACE2Q (ORCPT ); Wed, 2 Jan 2013 23:28:16 -0500 Received: from LGEMRELSE7Q.lge.com ([156.147.1.151]:62218 "EHLO LGEMRELSE7Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753199Ab3ACE2N (ORCPT ); Wed, 2 Jan 2013 23:28:13 -0500 X-AuditID: 9c930197-b7c5bae000000e31-c5-50e508d9cd6b From: Minchan Kim To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Minchan Kim , Rik van Riel , Mel Gorman Subject: [RFC 3/8] bail out when the page is in VOLATILE vma Date: Thu, 3 Jan 2013 13:28:01 +0900 Message-Id: <1357187286-18759-4-git-send-email-minchan@kernel.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1357187286-18759-1-git-send-email-minchan@kernel.org> References: <1357187286-18759-1-git-send-email-minchan@kernel.org> X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If we found a page is in VOLATILE vma, hurry up discarding instead of access bit check because it's very unlikey working set. Next patch will use it. Cc: Rik van Riel Cc: Mel Gorman Signed-off-by: Minchan Kim --- mm/rmap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/rmap.c b/mm/rmap.c index 402d9da..fea01cd 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -695,10 +695,12 @@ int page_referenced_one(struct page *page, struct vm_area_struct *vma, if (!pte) goto out; - if (vma->vm_flags & VM_LOCKED) { + if ((vma->vm_flags & VM_LOCKED) || + (vma->vm_flags & VM_VOLATILE)) { pte_unmap_unlock(pte, ptl); *mapcount = 0; /* break early from loop */ - *vm_flags |= VM_LOCKED; + *vm_flags |= (vma->vm_flags & VM_LOCKED ? + VM_LOCKED : VM_VOLATILE); goto out; } -- 1.7.9.5