From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754412AbXDWWbD (ORCPT ); Mon, 23 Apr 2007 18:31:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754415AbXDWWbA (ORCPT ); Mon, 23 Apr 2007 18:31:00 -0400 Received: from e4.ny.us.ibm.com ([32.97.182.144]:35934 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754383AbXDWWae (ORCPT ); Mon, 23 Apr 2007 18:30:34 -0400 Subject: Re: 2.6.21-rc7: HPET enabled freeze my machine at boot From: john stultz To: "Guilherme M. Schroeder" Cc: linux-kernel@vger.kernel.org, Thomas Gleixner In-Reply-To: <462A9926.2030303@centralinf.com.br> References: <4627D7CF.3070002@centralinf.com.br> <1f1b08da0704201453i1b2388der1dfe778633fbf6ea@mail.gmail.com> <462A9926.2030303@centralinf.com.br> Content-Type: text/plain Date: Mon, 23 Apr 2007 15:30:28 -0700 Message-Id: <1177367429.12242.7.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2007-04-21 at 20:07 -0300, Guilherme M. Schroeder wrote: > john stultz wrote: > > On 4/19/07, guilherme wrote: > >> Hi, > >> > >> If i enable "High Resolution Timer Support", my machine stops here at > >> boot: > >> > >> Clocksource tsc unstable (delta = -297340790165 ns) > >> Time: hpet clocksource has been installed. > >> > >> If i disable HPET, it boots fine. > > > > Hmmm.. What happens if you boot w/ clocksource=acpi_pm ? > > > > > > Boot ok with clocksource=acpi_pm and HPET enabled. > Any clue? I'm suspecting that your HPET counter is being stopped for some reason, although why I have no idea. Just to get a clear picture, does this happen w/ "Tickless System (Dynamic ticks)" disabled in the menuconfig? Thomas, might we be actually stopping the HPET counter instead of disabling the HPET interrupt w/ dynticks? thanks -john