From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751123AbXCQG0N (ORCPT ); Sat, 17 Mar 2007 02:26:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752184AbXCQG0M (ORCPT ); Sat, 17 Mar 2007 02:26:12 -0400 Received: from rwcrmhc11.comcast.net ([204.127.192.81]:53390 "EHLO rwcrmhc11.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751123AbXCQG0L (ORCPT ); Sat, 17 Mar 2007 02:26:11 -0400 Subject: Re: RSDL v0.31 From: Nicholas Miell To: Mike Galbraith Cc: Con Kolivas , ck@vds.kolivas.org, Ingo Molnar , Al Boldi , Andrew Morton , linux-kernel@vger.kernel.org In-Reply-To: <1174110965.7911.44.camel@Homer.simpson.net> References: <200703042335.26785.a1426z@gawab.com> <200703170040.48316.kernel@kolivas.org> <1174059299.7886.25.camel@Homer.simpson.net> <200703170813.32594.kernel@kolivas.org> <1174084207.7009.9.camel@Homer.simpson.net> <1174105443.3144.4.camel@entropy> <1174110965.7911.44.camel@Homer.simpson.net> Content-Type: text/plain Date: Fri, 16 Mar 2007 23:26:08 -0700 Message-Id: <1174112768.3144.8.camel@entropy> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-1.0.njm.1) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2007-03-17 at 06:56 +0100, Mike Galbraith wrote: > On Fri, 2007-03-16 at 21:24 -0700, Nicholas Miell wrote: > > > Sorry, I haven't really been following this thread and now I'm confused. > > > > You're saying that it's somehow the scheduler's fault that X isn't > > running with a high enough priority? > > I'm saying that the current scheduler adjusts for interactive loads, > this new one doesn't. I'm seeing interactivity regressions, and they > are not fixed with nice unless nice is used to maximum effect. I'm > saying yes, I can lower my expectations, but no I don't want to. > > A four line summary is as short as I can make it. > > -Mike Uh, no. Essentially, the current scheduler works around X's brokenness, in an often unpredictable manner. RSDL appears to be completely deterministic, which is a very strong virtue. The X people have plans for how to go about fixing this, but until then, there's no reason to hold up kernel development. -- Nicholas Miell