From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932810AbXCKDkU (ORCPT ); Sat, 10 Mar 2007 22:40:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932835AbXCKDkU (ORCPT ); Sat, 10 Mar 2007 22:40:20 -0500 Received: from smtp.osdl.org ([65.172.181.24]:35241 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932810AbXCKDkS (ORCPT ); Sat, 10 Mar 2007 22:40:18 -0500 Date: Sat, 10 Mar 2007 19:39:54 -0800 From: Andrew Morton To: Con Kolivas Cc: mpm@selenic.com, linux-kernel@vger.kernel.org, ck@vds.kolivas.org Subject: Re: RSDL-mm 0.28 Message-Id: <20070310193954.58389077.akpm@linux-foundation.org> In-Reply-To: <200703111459.28806.kernel@kolivas.org> References: <20070311013506.GD10459@waste.org> <8cd998d50703101828l71fbec7bi9a819ad7b7fd9828@mail.gmail.com> <20070310191614.5ac3cf4b.akpm@linux-foundation.org> <200703111459.28806.kernel@kolivas.org> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.19; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > On Sun, 11 Mar 2007 14:59:28 +1100 Con Kolivas wrote: > > Bottom line: we've had a _lot_ of problems with the new yield() semantics. > > We effectively broke back-compatibility by changing its behaviour a lot, > > and we can't really turn around and blame application developers for that. > > So... I would take it that's a yes for a recommendation with respect to > implementing a new yield() ? A new scheduler is as good a time as any to do > it. I guess so. We'd, err, need to gather Ingo's input ;) Perhaps a suitable way of doing this would be to characterise then emulate the 2.4 behaviour. As long as it turns out to be vaguely sensible.