From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx177.postini.com [74.125.245.177]) by kanga.kvack.org (Postfix) with SMTP id 7452E6B002C for ; Mon, 6 Feb 2012 05:07:53 -0500 (EST) Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 4C72B3EE0AE for ; Mon, 6 Feb 2012 19:07:51 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 319E445DE9A for ; Mon, 6 Feb 2012 19:07:51 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id CA8F645DE93 for ; Mon, 6 Feb 2012 19:07:50 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id BC2D41DB8055 for ; Mon, 6 Feb 2012 19:07:50 +0900 (JST) Received: from ml13.s.css.fujitsu.com (ml13.s.css.fujitsu.com [10.240.81.133]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 7631F1DB8048 for ; Mon, 6 Feb 2012 19:07:50 +0900 (JST) Date: Mon, 6 Feb 2012 19:06:27 +0900 From: KAMEZAWA Hiroyuki Subject: [RFC] [PATCH 0/6 v3] memcg: page cgroup diet Message-Id: <20120206190627.7313ff82.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "linux-mm@kvack.org" Cc: "linux-kernel@vger.kernel.org" , "hannes@cmpxchg.org" , Michal Hocko , Ying Han , Hugh Dickins , "akpm@linux-foundation.org" Here is my page_cgroup diet series v3. Since v2, "remove PCG_CACHE" is alread merged. This series changes page-stat-accounting per memcg from: if (change page's state) mem_cgroup_update_page_state() to: mem_cgroup_begin_update_page_state() if (change page's state) mem_cgroup_update_page_state() mem_cgroup_end_update_page_state() (see patch 4 for details.) This allows us not to duplicate page struct's information in page_cgroup's flag field. Because above sequence adds 2 extra calls to hot-path, performance will be problem. Patch 6 is a fix for performance, and I don't see performance regression in my small test. (see patch 6 for details.) Thanks, -Kame -- 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