Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754384AbYHYUua (ORCPT ); Mon, 25 Aug 2008 16:50:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753299AbYHYUuV (ORCPT ); Mon, 25 Aug 2008 16:50:21 -0400 Received: from mx2.redhat.com ([66.187.237.31]:53279 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753232AbYHYUuU (ORCPT ); Mon, 25 Aug 2008 16:50:20 -0400 Date: Mon, 25 Aug 2008 16:47:02 -0400 From: Dave Jones To: Andi Kleen Cc: Vegard Nossum , "H. Peter Anvin" , the arch/x86 maintainers , Linux Kernel Mailing List , Rusty Russell Subject: Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0() Message-ID: <20080825204700.GB27030@redhat.com> Mail-Followup-To: Dave Jones , Andi Kleen , Vegard Nossum , "H. Peter Anvin" , the arch/x86 maintainers , Linux Kernel Mailing List , Rusty Russell References: <19f34abd0808240220v77bcdd5di32f8f865b18fc49f@mail.gmail.com> <48B19799.6090703@kernel.org> <19f34abd0808241022j1ab6f3e6qd72b9acba5df4892@mail.gmail.com> <19f34abd0808241045r37eb8661h3cc688b6f0513777@mail.gmail.com> <20080824181304.GA5963@redhat.com> <20080825183611.GE26610@one.firstfloor.org> <20080825185450.GD11894@redhat.com> <20080825193926.GF26610@one.firstfloor.org> <20080825195029.GA27030@redhat.com> <20080825203649.GH26610@one.firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080825203649.GH26610@one.firstfloor.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1020 Lines: 29 On Mon, Aug 25, 2008 at 10:36:49PM +0200, Andi Kleen wrote: > > If we get a thermal event that was caused by temporary > > increased workload, temperature will drop off again when that workload > > is complete. > > But none of the cpufreq governours do this. They only care about > load, not about temperature. Which is good enough to stop p4 laptops from shutting down as soon as they've finished booting up. > > For sustained workloads we'd get additional thermal events, at which > > time we make a decision "ok, we've throttled as far as we can, and > > things are still going badly, power off". > > That is what the ACPI driver does when the trip point is reached. yes, except for that "we've throttled" part. Dave -- http://www.codemonkey.org.uk -- 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/