From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 381946B008C for ; Wed, 23 Nov 2011 19:10:21 -0500 (EST) Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id D08E83EE0AE for ; Thu, 24 Nov 2011 09:10:18 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id B7FAC45DF49 for ; Thu, 24 Nov 2011 09:10:18 +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 A1CE345DF48 for ; Thu, 24 Nov 2011 09:10:18 +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 968521DB804B for ; Thu, 24 Nov 2011 09:10:18 +0900 (JST) Received: from m105.s.css.fujitsu.com (m105.s.css.fujitsu.com [10.240.81.145]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 6491D1DB8050 for ; Thu, 24 Nov 2011 09:10:18 +0900 (JST) Date: Thu, 24 Nov 2011 09:09:15 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [patch 7/8] mm: memcg: modify PageCgroupAcctLRU non-atomically Message-Id: <20111124090915.2f6e2e2c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <1322062951-1756-8-git-send-email-hannes@cmpxchg.org> References: <1322062951-1756-1-git-send-email-hannes@cmpxchg.org> <1322062951-1756-8-git-send-email-hannes@cmpxchg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Johannes Weiner Cc: Andrew Morton , Michal Hocko , Balbir Singh , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org On Wed, 23 Nov 2011 16:42:30 +0100 Johannes Weiner wrote: > From: Johannes Weiner > > This bit is protected by zone->lru_lock, there is no need for locked > operations when setting and clearing it. > > Signed-off-by: Johannes Weiner This atomic ops are for avoiding race with other ops as lock_page_cgroup(). Or other Set/ClearPageCgroup.... Do I misunderstand atomic ops v.s. non-atomic ops race ? 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