Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946186Ab2EKVTt (ORCPT ); Fri, 11 May 2012 17:19:49 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:33728 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946069Ab2EKVTq (ORCPT ); Fri, 11 May 2012 17:19:46 -0400 Date: Fri, 11 May 2012 14:19:45 -0700 From: Andrew Morton To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "cgroups@vger.kernel.org" , Michal Hocko , Johannes Weiner , Frederic Weisbecker , Han Ying , Glauber Costa , Tejun Heo , "Aneesh Kumar K.V" , Hiroyuki Kamezawa , Linux Kernel Subject: Re: [PATCH 2/6] add res_counter_uncharge_until() Message-Id: <20120511141945.c487e94c.akpm@linux-foundation.org> In-Reply-To: <4FACE01A.4040405@jp.fujitsu.com> References: <4FACDED0.3020400@jp.fujitsu.com> <4FACE01A.4040405@jp.fujitsu.com> X-Mailer: Sylpheed 3.0.2 (GTK+ 2.20.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1053 Lines: 30 On Fri, 11 May 2012 18:47:06 +0900 KAMEZAWA Hiroyuki wrote: > From: Frederic Weisbecker > > At killing res_counter which is a child of other counter, > we need to do > res_counter_uncharge(child, xxx) > res_counter_charge(parent, xxx) > > This is not atomic and wasting cpu. This patch adds > res_counter_uncharge_until(). This function's uncharge propagates > to ancestors until specified res_counter. > > res_counter_uncharge_until(child, parent, xxx) > > Now, ops is atomic and efficient. > > Changelog since v2 > - removed unnecessary lines. > - Fixed 'From' , this patch comes from his series. Please signed-off-by if good. > > Signed-off-by: KAMEZAWA Hiroyuki Frederic's Signed-off-by: is unavaliable? -- 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/