From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754448Ab0EUNSA (ORCPT ); Fri, 21 May 2010 09:18:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43001 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753353Ab0EUNR7 (ORCPT ); Fri, 21 May 2010 09:17:59 -0400 Date: Fri, 21 May 2010 09:17:51 -0400 From: Vivek Goyal To: Gui Jianfeng Cc: Jens Axboe , linux kernel mailing list Subject: Re: [PATCH 0/4] io-controller: Add new interfaces to trace backlogged group status Message-ID: <20100521131751.GA15302@redhat.com> References: <4BF64712.1070500@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BF64712.1070500@cn.fujitsu.com> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 21, 2010 at 04:40:50PM +0800, Gui Jianfeng wrote: > Hi, > > This series implements three new interfaces to keep track of tranferred bytes, > elapsing time and io rate since group getting backlogged. If the group dequeues > from service tree, these three interfaces will reset and shows zero. Hi Gui, Can you give some details regarding how this functionality is useful? Why would somebody be interested in only in stats of till group was backlogged and not in total stats? Groups can come and go so fast and these stats will reset so many times that I am not able to visualize how these stats will be useful. Thanks Vivek > > Thanks > Gui