From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753772AbYAWMs7 (ORCPT ); Wed, 23 Jan 2008 07:48:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751780AbYAWMsw (ORCPT ); Wed, 23 Jan 2008 07:48:52 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:4976 "EHLO spitz.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751114AbYAWMsv (ORCPT ); Wed, 23 Jan 2008 07:48:51 -0500 Date: Fri, 11 Jan 2008 17:58:47 +0000 From: Pavel Machek To: Andrea Righi Cc: Balbir Singh , Peter Zijlstra , Valdis.Kletnieks@vt.edu, LKML Subject: Re: [RFC][PATCH] per-uid/gid I/O throttling (was Re: [RFC][PATCH] per-task I/O throttling) Message-ID: <20080111175847.GA4016@ucw.cz> References: <47869FFE.1050000@users.sourceforge.net> <661de9470801110759h318347acw5f08c91b48ca742d@mail.gmail.com> <47879A32.8060508@users.sourceforge.net> <3777.1200113861@turing-police.cc.vt.edu> <1200131197.7999.14.camel@lappy> <20080112105702.GC25388@balbir.in.ibm.com> <1200136245.7999.20.camel@lappy> <4789006C.2030804@users.sourceforge.net> <20080113044607.GA13633@balbir.in.ibm.com> <478CE41F.5010401@users.sourceforge.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <478CE41F.5010401@users.sourceforge.net> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 2008-01-15 17:49:36, Andrea Righi wrote: > Allow to limit the I/O bandwidth for specific uid(s) or gid(s) imposing > additional delays on those processes that exceed the limits defined in a > configfs tree. > > Examples: > > Limit the I/O bandwidth for user www-data (UID 33) to 4MB/s: > > root@linux:/config/io-throttle# mkdir uid:33 > root@linux:/config/io-throttle# cd uid:33/ > root@linux:/config/io-throttle/uid:33# cat io-rate > io-rate: 0 KiB/sec > requested: 0 KiB > last_request: 0 jiffies > delta: 388202 jiffies > root@linux:/config/io-throttle/uid:33# echo 4096 > io-rate > root@linux:/config/io-throttle/uid:33# cat io-rate > io-rate: 4096 KiB/sec > requested: 0 KiB > last_request: 389271 jiffies > delta: 91 jiffies > > Limit the I/O bandwidth of group backup (GID 34) to 512KB/s: Maybe ionice from cfq should be improved, instead? -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html