Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262661AbVEOKBz (ORCPT ); Sun, 15 May 2005 06:01:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262766AbVEOKBz (ORCPT ); Sun, 15 May 2005 06:01:55 -0400 Received: from colin.muc.de ([193.149.48.1]:8715 "EHLO mail.muc.de") by vger.kernel.org with ESMTP id S262661AbVEOKBs (ORCPT ); Sun, 15 May 2005 06:01:48 -0400 Date: 15 May 2005 12:01:47 +0200 Date: Sun, 15 May 2005 12:01:47 +0200 From: Andi Kleen To: Arjan van de Ven Cc: Lee Revell , Alan Cox , Dave Jones , Matt Mackall , Andy Isaacson , "Richard F. Rebel" , Gabor MICSKO , Linux Kernel Mailing List , tytso@mit.edu Subject: Re: Hyper-Threading Vulnerability Message-ID: <20050515100147.GA72234@muc.de> References: <20050513215905.GY5914@waste.org> <1116024419.20646.41.camel@localhost.localdomain> <1116025212.6380.50.camel@mindpipe> <20050513232708.GC13846@redhat.com> <1116027488.6380.55.camel@mindpipe> <1116084186.20545.47.camel@localhost.localdomain> <1116088229.8880.7.camel@mindpipe> <1116089068.6007.13.camel@laptopd505.fenrus.org> <1116093396.9141.11.camel@mindpipe> <1116093694.6007.15.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1116093694.6007.15.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1143 Lines: 27 On Sat, May 14, 2005 at 08:01:33PM +0200, Arjan van de Ven wrote: > On Sat, 2005-05-14 at 13:56 -0400, Lee Revell wrote: > > On Sat, 2005-05-14 at 18:44 +0200, Arjan van de Ven wrote: > > > then JACK is terminally broken if it doesn't have a fallback for non- > > > rdtsc cpus. > > > > It does have a fallback, but the selection is done at compile time. It > > uses rdtsc for all x86 CPUs except pre-i586 SMP systems. > > > > Maybe we should check at runtime, > > it's probably a sign that JACK isn't used on SMP systems much, at least > not on the bigger systems (like IBM's x440's) where the tsc *will* > differ wildly between cpus... It does not even need SMP, just use a Centrino laptop. I suppose what the Jack guys are doing is to recommend to disable frequency scaling then the sound guys complain again that sound on linux is so hard to use. I wonder where this comes from? :) -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/