Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761660AbYAKPoZ (ORCPT ); Fri, 11 Jan 2008 10:44:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760199AbYAKPoQ (ORCPT ); Fri, 11 Jan 2008 10:44:16 -0500 Received: from as4.cineca.com ([130.186.84.213]:38399 "EHLO as1.cineca.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1760190AbYAKPoP (ORCPT ); Fri, 11 Jan 2008 10:44:15 -0500 Message-ID: <47878EC1.4000907@users.sourceforge.net> From: Andrea Righi Reply-To: righiandr@users.sourceforge.net User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.12) Gecko/20070604 Thunderbird/1.5.0.12 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: David Newall Cc: LKML , Jens Axboe Subject: Re: [RFC][PATCH] per-task I/O throttling References: <47869FFE.1050000@users.sourceforge.net> <4787779B.1070100@davidnewall.com> In-Reply-To: <4787779B.1070100@davidnewall.com> X-Enigmail-Version: 0.95.0 OpenPGP: id=77CEF397; url=keyserver.veridis.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Date: Fri, 11 Jan 2008 16:44:01 +0100 (MET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 723 Lines: 21 David Newall wrote: > Andrea Righi wrote: >> [I/O-intensive] processes can noticeably impact the system responsiveness >> for some time and playing with tasks' priority is not always an >> acceptable solution. >> > > Why? > Well, I mean, we can't use 'nice' to grant less priority for the I/O intensive app, because the I/O intensive app itself doesn't need a lot of CPU. Instead, the I/O-bound app eats all the available I/O bandwidth, that's a different issue. -Andrea -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/