From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 1476D8D0040 for ; Mon, 28 Mar 2011 21:31:16 -0400 (EDT) Received: from m3.gw.fujitsu.co.jp (unknown [10.0.50.73]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 162B13EE0C0 for ; Tue, 29 Mar 2011 10:31:12 +0900 (JST) Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id EED7E45DE76 for ; Tue, 29 Mar 2011 10:31:11 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id BA5EF45DE92 for ; Tue, 29 Mar 2011 10:31:11 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id AD128E18001 for ; Tue, 29 Mar 2011 10:31:11 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.240.81.134]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 797EBE08002 for ; Tue, 29 Mar 2011 10:31:11 +0900 (JST) Date: Tue, 29 Mar 2011 10:24:45 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH v2] memcg: update documentation to describe usage_in_bytes Message-Id: <20110329102445.a46760ef.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20110329101511.d30f3518.nishimura@mxp.nes.nec.co.jp> References: <20110321102420.GB26047@tiehlicka.suse.cz> <20110322091014.27677ab3.kamezawa.hiroyu@jp.fujitsu.com> <20110322104723.fd81dddc.nishimura@mxp.nes.nec.co.jp> <20110322073150.GA12940@tiehlicka.suse.cz> <20110323092708.021d555d.nishimura@mxp.nes.nec.co.jp> <20110323133517.de33d624.kamezawa.hiroyu@jp.fujitsu.com> <20110328085508.c236e929.nishimura@mxp.nes.nec.co.jp> <20110328132550.08be4389.nishimura@mxp.nes.nec.co.jp> <20110328074341.GA5693@tiehlicka.suse.cz> <20110328181127.b8a2a1c5.kamezawa.hiroyu@jp.fujitsu.com> <20110328094820.GC5693@tiehlicka.suse.cz> <20110328193108.07965b4a.kamezawa.hiroyu@jp.fujitsu.com> <20110329101511.d30f3518.nishimura@mxp.nes.nec.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Daisuke Nishimura Cc: Michal Hocko , Andrew Morton , linux-mm@kvack.org, LKML On Tue, 29 Mar 2011 10:15:11 +0900 Daisuke Nishimura wrote: > === > From: Daisuke Nishimura > > Since 569b846d(memcg: coalesce uncharge during unmap/truncate), we do batched > (delayed) uncharge at truncation/unmap. And since cdec2e42(memcg: coalesce > charging via percpu storage), we have percpu cache for res_counter. > > These changes improved performance of memory cgroup very much, but made > res_counter->usage usually have a bigger value than the actual value of memory usage. > So, *.usage_in_bytes, which show res_counter->usage, are not desirable for precise > values of memory(and swap) usage anymore. > > Instead of removing these files completely(because we cannot know res_counter->usage > without them), this patch updates the meaning of those files. > > Signed-off-by: Daisuke Nishimura Acked-by: KAMEZAWA Hiroyuki -- 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