Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261400AbVEaUQM (ORCPT ); Tue, 31 May 2005 16:16:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261431AbVEaUQM (ORCPT ); Tue, 31 May 2005 16:16:12 -0400 Received: from warden2-p.diginsite.com ([209.195.52.120]:48888 "HELO warden2.diginsite.com") by vger.kernel.org with SMTP id S261400AbVEaUQF (ORCPT ); Tue, 31 May 2005 16:16:05 -0400 From: David Lang To: Andi Kleen Cc: Steven Rostedt , karim@opersys.com, linux-kernel@vger.kernel.org, akpm@osdl.org, hch@infradead.org, dwalker@mvista.com, Ingo Molnar , Sven-Thorsten Dietrich , James Bruce , kus Kusche Klaus , Nick Piggin , Esben Nielsen , "Bill Huey (hui)" Date: Tue, 31 May 2005 13:14:40 -0700 (PDT) X-X-Sender: dlang@dlang.diginsite.com Subject: Re: RT patch acceptance In-Reply-To: <20050531200114.GD9372@muc.de> Message-ID: References: <429B61F7.70608@opersys.com> <20050530223434.GC9972@nietzsche.lynx.com> <429B9880.1070604@opersys.com> <20050530224949.GE9972@nietzsche.lynx.com> <429B9E85.2000709@opersys.com> <1117556975.2569.37.camel@localhost.localdomain> <20050531200114.GD9372@muc.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2060 Lines: 48 how much of a slowdown is it? distros already throw >20% performance improvements on the floor to simplify their lives by reduceing the number of different binary kernels they have to support. somehow I don't think a 5% or so (which is the locking overhead of running a SMP kernel on UP last I heard) would be the end of the world for them, especially if it made multimedia eye candy work smoother. David Lang On Tue, 31 May 2005, Andi Kleen wrote: > Date: 31 May 2005 22:01:14 +0200 Tue, 31 May 2005 22:01:14 +0200 > From: Andi Kleen > To: Steven Rostedt > Cc: karim@opersys.com, linux-kernel@vger.kernel.org, akpm@osdl.org, > hch@infradead.org, dwalker@mvista.com, Ingo Molnar , > Sven-Thorsten Dietrich , > James Bruce , kus Kusche Klaus , > Nick Piggin , Esben Nielsen , > "Bill Huey (hui)" > Subject: Re: RT patch acceptance > > On Tue, May 31, 2005 at 12:29:35PM -0400, Steven Rostedt wrote: >> I would assume that the distros would ship without PREEMPT enabled >> because it was (and probably still is) considered unstable. > > In addition to that it is slow too due to much increased locking > overhead. > > -Andi > - > 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/ > -- There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies. -- C.A.R. Hoare - 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/