From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx149.postini.com [74.125.245.149]) by kanga.kvack.org (Postfix) with SMTP id 18C1E6B004F for ; Mon, 19 Dec 2011 10:56:17 -0500 (EST) Date: Mon, 19 Dec 2011 16:56:13 +0100 From: Johannes Weiner Subject: Re: [PATCH 0/4] memcg: simplify LRU handling. Message-ID: <20111219155613.GE1415@cmpxchg.org> References: <20111214164734.4d7d6d97.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20111214164734.4d7d6d97.kamezawa.hiroyu@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Michal Hocko , "akpm@linux-foundation.org" , Hugh Dickins , Ying Han On Wed, Dec 14, 2011 at 04:47:34PM +0900, KAMEZAWA Hiroyuki wrote: > > This series is onto linux-next + > memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch > > The 1st purpose of this patch is reduce overheads of mem_cgroup_add/del_lru. > They uses some atomic ops. Which is noticable. With a simple sparse file cat, mem_cgroup_lru_add_list() went from 1.12% cat [kernel.kallsyms] [k] mem_cgroup_lru_add_list to 0.31% cat [kernel.kallsyms] [k] mem_cgroup_lru_add_list and real time went down, too: 5 runs min median max in seconds vanilla: 7.762 7.782 7.816 patched: 7.622 7.631 7.660 -- 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