From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [PATCH 5/5] intel_idle: do not use the LAPIC timer for ATOM C2 Date: Tue, 2 Nov 2010 02:21:09 +0100 Message-ID: <20101102011956.GA2648@ucw.cz> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Len Brown Cc: Len Brown , linux-pm@lists.linux-foundation.org List-Id: linux-pm@vger.kernel.org On Tue 2010-10-26 17:07:34, Len Brown wrote: > From: Len Brown > > If we use the LAPIC timer during ATOM C2 on > some nvidia chisets, the system stalls. > > https://bugzilla.kernel.org/show_bug.cgi?id=21032 > @@ -302,7 +302,7 @@ static int intel_idle_probe(void) > > case 0x1C: /* 28 - Atom Processor */ > case 0x26: /* 38 - Lincroft Atom Processor */ > - lapic_timer_reliable_states = (1 << 2) | (1 << 1); /* C2, C1 */ > + lapic_timer_reliable_states = (1 << 1); /* C1 */ > cpuidle_state_table = atom_cstates; That comment should probably go here, along with list of chipsets. -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html