Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750767AbVIUEDu (ORCPT ); Wed, 21 Sep 2005 00:03:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750826AbVIUEDu (ORCPT ); Wed, 21 Sep 2005 00:03:50 -0400 Received: from nevyn.them.org ([66.93.172.17]:62602 "EHLO nevyn.them.org") by vger.kernel.org with ESMTP id S1750767AbVIUEDt (ORCPT ); Wed, 21 Sep 2005 00:03:49 -0400 Date: Wed, 21 Sep 2005 00:03:42 -0400 From: Daniel Jacobowitz To: john stultz Cc: Andi Kleen , Andrew Morton , lkml , discuss@x86-64.org Subject: Re: [discuss] Re: [PATCH] x86-64: Fix bad assumption that dualcore cpus have synced TSCs Message-ID: <20050921040342.GA7175@nevyn.them.org> Mail-Followup-To: john stultz , Andi Kleen , Andrew Morton , lkml , discuss@x86-64.org References: <1127157404.3455.209.camel@cog.beaverton.ibm.com> <20050919193105.GA12810@verdi.suse.de> <1127158937.3455.214.camel@cog.beaverton.ibm.com> <20050919194934.GC12810@verdi.suse.de> <1127242785.11080.20.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1127242785.11080.20.camel@cog.beaverton.ibm.com> User-Agent: Mutt/1.5.8i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 956 Lines: 23 On Tue, Sep 20, 2005 at 11:59:45AM -0700, john stultz wrote: > So, bugzilla.kernel.org has (temporarily at least) lost the reports from > yesterday, but from the email i got, folks using my TSC consistency > check that I posted were seeing what appears to be unsynched TSCs on > dualcore AMD systems. > > Personally I suspect that the powernow driver is putting the cores > independently into low power sleep and the TSCs are being independently > halted, causing them to become unsynchronized. > > Do you still feel there is some other issue here? Any ideas for shaking > out whatever else might in play? FYI, at least I have reproduced this without powernow loaded. -- Daniel Jacobowitz CodeSourcery, LLC - 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/