From owner-freebsd-stable@FreeBSD.ORG Tue May 25 15:52:30 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 348261065674 for ; Tue, 25 May 2010 15:52:30 +0000 (UTC) (envelope-from demelier.david@gmail.com) Received: from mail-bw0-f54.google.com (mail-bw0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id AD7FA8FC17 for ; Tue, 25 May 2010 15:52:29 +0000 (UTC) Received: by bwz2 with SMTP id 2so1576585bwz.13 for ; Tue, 25 May 2010 08:52:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=8ntyxj7LQV+6cLKQbCav5t6jXbdkxA2R1bjvUgeXXxE=; b=CDK7ZgCyLqohivj/582kyNgt41QVG3QJJS48Wxs3Yhj+i38iIusyp8i7JEbaYLrOqD bzA3RZkFqo0dupL+Y/eaPXBZXON3xjzVP00FNRufGAaS0Vf/3OpPW9H20rR7JS5GImMv CkEavRYg77pK3KGXmJd8Rk38N+y9NvPDMqF7Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=VTD8IFnLz7qS+jBBg5yBAF8RMu/Zm7ivTqmKsXbWn3jVEisVj4m43yr42a4rBgSx+p eS5EnnFTdENQ3iqaocjOzWoqwIQFRyURL958LWQP/hBYTmXZWOppiHHyr98t1eLV2teP vpfKsEnrv4id7TxM1W8ABRB4phzrfZafxpp+8= MIME-Version: 1.0 Received: by 10.204.152.2 with SMTP id e2mr3066004bkw.81.1274802748377; Tue, 25 May 2010 08:52:28 -0700 (PDT) Received: by 10.204.123.202 with HTTP; Tue, 25 May 2010 08:52:28 -0700 (PDT) In-Reply-To: References: <4DEBDE2C-C0D2-469D-AC42-DD5027926424@FreeBSD.org> <20100507120843.GA1738@Melon.malikania.fr> <1273257226.1671.3.camel@malikania.fr> Date: Tue, 25 May 2010 17:52:28 +0200 Message-ID: From: David DEMELIER To: Giovanni Trematerra Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-stable@freebsd.org Subject: Re: Kernel panic when unpluggin AC adaptor X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 May 2010 15:52:30 -0000 2010/5/25 Giovanni Trematerra : > On Mon, May 24, 2010 at 9:43 PM, David DEMELIER > wrote: >> 2010/5/12 Giovanni Trematerra : >>> On Fri, May 7, 2010 at 8:33 PM, Demelier David wrote: >>>> Le Vendredi 07 mai 2010 =C3=A0 18:22 +0200, Giovanni Trematerra a =C3= =A9crit : >>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David wrote: >>>>> > Hi, >>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0I noticed that pluggin the AC adaptor wh= en I boot without it does not >>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0panic. It only panic when removing it. >>>>> > >>>>> > =C2=A0 =C2=A0 =C2=A0 =C2=A0Maybe that could help ? >>>>> > >>>>> >>>>> Good to know. The problem lies somewhere when performance state chang= e. >>>>> In your case it happens when you remove AC adaptor. Let's hope someon= e on >>>>> acpi@ ml comes up with a good idea. >>>>> >>>> >>>> Okay so for the moment no change, I'll wait for someone with an idea >>>> that could solve my problem. For me because the panic only happens whe= n >>>> changing profile from ac plugged -> ac unplugged (and not the reverse)= I >>>> would think it's a cpu related acpi issue. >>>> >>> >>> I looked deeper and it seems to me that when you unplug the AC >>> adapter, acpi_cpu_notify calls acpi_cpu_cx_cst that try to allocate a >>> new cx_ptr->p_lvlx =C2=A0via acpi_PkgGas. >>> If acpi_PkgGas set cx_ptr->p_lvlx to NULL for any reasons you'll have >>> the panic that you reported. >>> A solution would be to set acpi_cpu_hook to NULL so acpi_cpu_idle won't= call it. >>> I need some time to have a patch because of the possible race between >>> acpi_cpu_notify and >>> acpi_cpu_idle during set acpi_cpu_hook to NULL. >>> if you have time and want panic your system you could try the attached >>> patch, just to be >>> sure that we catch it. >>> >> >> Hi, it paniced today ! I don't know why it randomly panic but it did, >> the backtrace didn't change. There is a picture about the panic : >> >> http://img541.imageshack.us/img541/2773/dsc00388xa.jpg > > What was you trying? acpi_idle5.diff.txt patch? > How did it panic? Unplugging AC adapter? > Hi, I tried this one : lvlx.diff.txt. Yes by unplugging the AC adapter. --=20 Demelier David