From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760568AbZELJxa (ORCPT ); Tue, 12 May 2009 05:53:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758537AbZELJxO (ORCPT ); Tue, 12 May 2009 05:53:14 -0400 Received: from rankki.sonarnerd.net ([83.145.240.118]:41051 "EHLO mail.sonarnerd.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755970AbZELJxN (ORCPT ); Tue, 12 May 2009 05:53:13 -0400 Message-ID: <4A094707.5040307@sonarnerd.net> Date: Tue, 12 May 2009 12:53:11 +0300 From: Jussi Laako User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Peter Zijlstra CC: James Courtier-Dutton , linux-kernel@vger.kernel.org, Ingo Molnar , d.faggioli@sssup.it Subject: Re: [RFC][PATCH] Multimedia scheduling class, take 2 References: <4959198A.3020209@sonarnerd.net> <1230622925.16718.26.camel@twins> <4959DE51.2020605@sonarnerd.net> <1231756114.19771.6.camel@laptop> <496C6294.2040707@sonarnerd.net> <4971D3D5.6040801@superbug.co.uk> <497CF128.2060903@sonarnerd.net> <1232954745.4863.4.camel@laptop> <4A07E044.8040807@sonarnerd.net> <1242107859.11251.301.camel@twins> In-Reply-To: <1242107859.11251.301.camel@twins> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Peter Zijlstra wrote: > As to the patch, I still think its an exceedingly bad idea to create > such a horridly ill defined scheduler class. There's nothing that keeps > people from stuffing everything in there and either generating DoS > issues or still generating bad interactivity. Lite patch practically exports nice levels as scheduling priorities in order to make it possible to assign different levels to different threads of the same process. > I certainly don't think the current situation is bad enough to warrant > things like that, media on my machines works peachy (*cheer* for XV on > R600). Naturally pretty much anything works when CPU load is under 25%. When the load on low power embedded system is around 95-100% things get hairier... "Buy faster CPU" is not always an option... - Jussi