From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id BF4B76B0012 for ; Thu, 12 May 2011 23:53:42 -0400 (EDT) Received: by qyk2 with SMTP id 2so148770qyk.14 for ; Thu, 12 May 2011 20:53:40 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20110513121030.08fcae08.kamezawa.hiroyu@jp.fujitsu.com> References: <20110513121030.08fcae08.kamezawa.hiroyu@jp.fujitsu.com> Date: Fri, 13 May 2011 12:53:40 +0900 Message-ID: Subject: Re: [PATCH][BUGFIX] memcg fix zone congestion From: Minchan Kim Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: KAMEZAWA Hiroyuki Cc: "linux-mm@kvack.org" , "akpm@linux-foundation.org" , "nishimura@mxp.nes.nec.co.jp" , "balbir@linux.vnet.ibm.com" , Ying Han , Johannes Weiner , Michal Hocko On Fri, May 13, 2011 at 12:10 PM, KAMEZAWA Hiroyuki wrote: > > ZONE_CONGESTED should be a state of global memory reclaim. > If not, a busy memcg sets this and give unnecessary throttoling in > wait_iff_congested() against memory recalim in other contexts. This makes > system performance bad. > > I'll think about "memcg is congested!" flag is required or not, later. > But this fix is required 1st. It's reasonable. > > Signed-off-by: KAMEZAWA Hiroyuki Reviewed-by: Minchan Kim -- Kind regards, Minchan Kim -- 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