From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id 55FF26B002D for ; Mon, 21 Nov 2011 19:37:38 -0500 (EST) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 96D493EE0BD for ; Tue, 22 Nov 2011 09:37:35 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 7CCB645DE4F for ; Tue, 22 Nov 2011 09:37:35 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 6067745DE4D for ; Tue, 22 Nov 2011 09:37:35 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 5166AE18001 for ; Tue, 22 Nov 2011 09:37:35 +0900 (JST) Received: from m106.s.css.fujitsu.com (m106.s.css.fujitsu.com [10.240.81.146]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 198251DB802F for ; Tue, 22 Nov 2011 09:37:35 +0900 (JST) Date: Tue, 22 Nov 2011 09:36:22 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH] fix mem_cgroup_split_huge_fixup to work efficiently. Message-Id: <20111122093622.eba8bbef.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: References: <20111117103308.063f78df.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: Balbir Singh Cc: "linux-mm@kvack.org" , cgroups@vger.kernel.org, "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "hannes@cmpxchg.org" , mhocko@suse.cz, Andrea Arcangeli On Mon, 21 Nov 2011 16:30:11 +0530 Balbir Singh wrote: > On Thu, Nov 17, 2011 at 7:03 AM, KAMEZAWA Hiroyuki > wrote: > > > > I'll send this again when mm is shipped. > > I sometimes see mem_cgroup_split_huge_fixup() in perf report and noticed > > it's very slow. This fixes it. Any comments are welcome. > > > > How do you see this - what tests? > Sometimes. By applications calling fork() or mremap(), mprotect(), which will cause split_huge_page(). But not 100% reporoducable, yet. 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