Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753548AbYJ3EjC (ORCPT ); Thu, 30 Oct 2008 00:39:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751566AbYJ3Eiy (ORCPT ); Thu, 30 Oct 2008 00:38:54 -0400 Received: from serv2.oss.ntt.co.jp ([222.151.198.100]:55735 "EHLO serv2.oss.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750849AbYJ3Eix (ORCPT ); Thu, 30 Oct 2008 00:38:53 -0400 Subject: [PATCH] memcg: do not recalculate section unnecessarily in init_section_page_cgroup From: Fernando Luis =?ISO-8859-1?Q?V=E1zquez?= Cao To: akpm@linux-foundation.org Cc: kamezawa.hiroyu@jp.fujitsu.com, linux-kernel@vger.kernel.org Content-Type: text/plain Organization: NTT Open Source Software Center Date: Thu, 30 Oct 2008 13:38:50 +0900 Message-Id: <1225341530.3135.26.camel@sebastian.kern.oss.ntt.co.jp> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1163 Lines: 36 Signed-off-by: Fernando Luis Vazquez Cao --- diff -urNp linux-2.6.28-rc2-mm1-orig/mm/page_cgroup.c linux-2.6.28-rc2-mm1/mm/page_cgroup.c --- linux-2.6.28-rc2-mm1-orig/mm/page_cgroup.c 2008-10-30 12:49:27.000000000 +0900 +++ linux-2.6.28-rc2-mm1/mm/page_cgroup.c 2008-10-30 12:52:41.000000000 +0900 @@ -99,13 +99,11 @@ struct page_cgroup *lookup_page_cgroup(s int __meminit init_section_page_cgroup(unsigned long pfn) { - struct mem_section *section; + struct mem_section *section = __pfn_to_section(pfn); struct page_cgroup *base, *pc; unsigned long table_size; int nid, index; - section = __pfn_to_section(pfn); - if (section->page_cgroup) return 0; @@ -131,7 +129,6 @@ int __meminit init_section_page_cgroup(u __init_page_cgroup(pc, pfn + index); } - section = __pfn_to_section(pfn); section->page_cgroup = base - pfn; total_usage += table_size; return 0; -- 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/