Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753957Ab2ENBMj (ORCPT ); Sun, 13 May 2012 21:12:39 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:48798 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753227Ab2ENBMh (ORCPT ); Sun, 13 May 2012 21:12:37 -0400 X-SecurityPolicyCheck: OK by SHieldMailChecker v1.7.4 Message-ID: <4FB05B8F.8020408@jp.fujitsu.com> Date: Mon, 14 May 2012 10:10:39 +0900 From: KAMEZAWA Hiroyuki User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Andrew Morton 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() References: <4FACDED0.3020400@jp.fujitsu.com> <4FACE01A.4040405@jp.fujitsu.com> <20120511141945.c487e94c.akpm@linux-foundation.org> In-Reply-To: <20120511141945.c487e94c.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1390 Lines: 43 (2012/05/12 6:19), Andrew Morton wrote: > 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? > I didn't add his Signed-off because I modified his orignal patch a little... I dropped res_counter_charge_until() because it's not used in this series, I have no justification for adding it. The idea of res_counter_uncharge_until() is from his patch. Thanks, -Kame -- 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/