From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753961Ab3GINnU (ORCPT ); Tue, 9 Jul 2013 09:43:20 -0400 Received: from mail-la0-f52.google.com ([209.85.215.52]:39145 "EHLO mail-la0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753656Ab3GINnQ (ORCPT ); Tue, 9 Jul 2013 09:43:16 -0400 Message-ID: <51DC136E.6020901@openvz.org> Date: Tue, 09 Jul 2013 17:43:10 +0400 From: Konstantin Khlebnikov User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.12) Gecko/20130119 Firefox/10.0.11esrpre Iceape/2.7.12 MIME-Version: 1.0 To: Tejun Heo CC: Vivek Goyal , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michal Hocko , cgroups@vger.kernel.org, Andrew Morton , Sha Zhengju , devel@openvz.org, Jens Axboe Subject: Re: [PATCH RFC] fsio: filesystem io accounting cgroup References: <20130708100046.14417.12932.stgit@zurg> <20130708170047.GA18600@mtj.dyndns.org> <20130708175201.GB9094@redhat.com> <20130708175607.GB18600@mtj.dyndns.org> <51DBC99F.4030301@openvz.org> <20130709125734.GA2478@htj.dyndns.org> <51DC0CE2.2050906@openvz.org> <20130709131605.GB2478@htj.dyndns.org> <20130709131646.GC2478@htj.dyndns.org> In-Reply-To: <20130709131646.GC2478@htj.dyndns.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tejun Heo wrote: > On Tue, Jul 09, 2013 at 06:16:05AM -0700, Tejun Heo wrote: >> On Tue, Jul 09, 2013 at 05:15:14PM +0400, Konstantin Khlebnikov wrote: >>> blkio controls block devices. not filesystems or superblocks or bdi or pagecache. >>> It's all about block layer and nothing more. Am I right? >>> >>> So, you want to link some completely unrelated subsystems like NFS into the block layer? >> >> Heh, yeah, sure, network QoS is completely unrelated to sockets too, >> right? > > And, no, blkio wouldn't have anything to do with NFS. Where did you > get that idea? > My concept it cgroup which would control io operation on vfs layer for all filesystems. It will account and manage IO operations. I've found really lightweight technique for accounting and throttling which don't introduce new locks or priority inversions (which is major problem in all existing throttlers, including cpu cgroup rate limiter) So, I've tried to keep code smaller, cleaner and saner as possible while you guys are trying to push me into the block layer =)