Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261454AbVEPI27 (ORCPT ); Mon, 16 May 2005 04:28:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261482AbVEPI1R (ORCPT ); Mon, 16 May 2005 04:27:17 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:53925 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S261385AbVEPHZ4 (ORCPT ); Mon, 16 May 2005 03:25:56 -0400 Subject: Re: Hyper-Threading Vulnerability From: Arjan van de Ven To: Lee Revell Cc: Dave Jones , Alan Cox , Matt Mackall , Andy Isaacson , Andi Kleen , "Richard F. Rebel" , Gabor MICSKO , Linux Kernel Mailing List , tytso@mit.edu In-Reply-To: <1116198609.25898.22.camel@mindpipe> References: <1116089068.6007.13.camel@laptopd505.fenrus.org> <1116093396.9141.11.camel@mindpipe> <1116093694.6007.15.camel@laptopd505.fenrus.org> <1116098504.9141.31.camel@mindpipe> <1116100126.6007.17.camel@laptopd505.fenrus.org> <1116114052.9141.38.camel@mindpipe> <1116142233.6270.9.camel@laptopd505.fenrus.org> <1116189693.17990.1.camel@localhost.localdomain> <1116190107.6270.34.camel@laptopd505.fenrus.org> <1116191459.10653.16.camel@mindpipe> <20050515225537.GA22594@redhat.com> <1116198609.25898.22.camel@mindpipe> Content-Type: text/plain Date: Mon, 16 May 2005 09:25:43 +0200 Message-Id: <1116228343.6274.0.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit X-Spam-Score: 3.7 (+++) X-Spam-Report: SpamAssassin version 2.63 on pentafluge.infradead.org summary: Content analysis details: (3.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1727 Lines: 36 On Sun, 2005-05-15 at 19:10 -0400, Lee Revell wrote: > On Sun, 2005-05-15 at 18:55 -0400, Dave Jones wrote: > > On Sun, May 15, 2005 at 05:10:59PM -0400, Lee Revell wrote: > > > On Sun, 2005-05-15 at 22:48 +0200, Arjan van de Ven wrote: > > > > On Sun, 2005-05-15 at 21:41 +0100, Alan Cox wrote: > > > > > On Sul, 2005-05-15 at 08:30, Arjan van de Ven wrote: > > > > > > stop entirely.... (and that is also happening more and more and linux is > > > > > > getting more agressive idle support (eg no timer tick and such patches) > > > > > > which will trigger bios thresholds for this even more too. > > > > > > > > > > Cyrix did TSC stop on halt a long long time ago, back when it was worth > > > > > the power difference. > > > > > > > > With linux going to ACPI C2 mode more... tsc is defined to halt in C2... > > > > > > JACK doesn't care about any of this now, the behavior when you > > > suspend/resume with a running jackd is undefined. Eventually we should > > > handle it, but there's no point until the ALSA drivers get proper > > > suspend/resume support. > > > > suspend/resume are S states, not C states. C states are occuring > > during runtime. > > It should never go into C2 if jackd is running, because you're getting > interrupts from the audio interface at least every 100ms or so (usually > much more often) which will wake up jackd and any clients. you're not guaranteed to not enter C2 in that case. C2 can happen after a few ms already - 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/