From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx132.postini.com [74.125.245.132]) by kanga.kvack.org (Postfix) with SMTP id 0E01C6B0092 for ; Fri, 2 Mar 2012 15:35:37 -0500 (EST) From: Naoya Horiguchi Subject: [PATCH] memcg: fix mapcount check in move charge code for anonymous page Date: Fri, 2 Mar 2012 15:35:08 -0500 Message-Id: <1330720508-21019-1-git-send-email-n-horiguchi@ah.jp.nec.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Andrew Morton , Andrea Arcangeli , KAMEZAWA Hiroyuki , Daisuke Nishimura , Hillf Danton , linux-kernel@vger.kernel.org, Naoya Horiguchi Currently charge on shared anonyous pages is supposed not to moved in task migration. To implement this, we need to check that mapcount > 1, instread of > 2. So this patch fixes it. Signed-off-by: Naoya Horiguchi --- mm/memcontrol.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git linux-next-20120228.orig/mm/memcontrol.c linux-next-20120228/mm/memcontrol.c index b6d1bab..785f6d3 100644 --- linux-next-20120228.orig/mm/memcontrol.c +++ linux-next-20120228/mm/memcontrol.c @@ -5102,7 +5102,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma, return NULL; if (PageAnon(page)) { /* we don't move shared anon */ - if (!move_anon() || page_mapcount(page) > 2) + if (!move_anon() || page_mapcount(page) > 1) return NULL; } else if (!move_file()) /* we ignore mapcount for file pages */ -- 1.7.7.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org