From owner-freebsd-stable@FreeBSD.ORG Wed May 26 09:14:28 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 078941065674 for ; Wed, 26 May 2010 09:14:28 +0000 (UTC) (envelope-from demelier.david@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 7E9458FC15 for ; Wed, 26 May 2010 09:14:27 +0000 (UTC) Received: by mail-fx0-f54.google.com with SMTP id 17so1429183fxm.13 for ; Wed, 26 May 2010 02:14:27 -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=2jYAN31y5R94MuvNlS+UxA+SaDGYqAAlry2TNj5kHzw=; b=iAmkA8p6QF4CvWcwpjvFLcFBPDaAlnOloqrYgDA8H3wjpAV0XDSE35J9d/fmUzn9fy mNTisoIlCHsyc/Qgd4sszckEWvL/4MhBbSR36/LbXFNtRaZCgDnbjnz/CmwLhDbQuL+N rGgMbyStvCzrUxAzmXCkmVOXLHoK/G0LSl4Sg= 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=E85Q6gt7wffRr/qpPHaUhsOeGQLvGcw/2VK7QgGQBuoA1VzIdZTI83SmFEryFnZsl5 yRRBSOk5m70CdrU4SvUIhexgVzSOqD9zRm81sK6RQ9qQ4N3PhBoKjVAFKz/GdkrQHa4k eIWzLy7hkdQSzU5EGKO0fhDkpPY2VrEEQXdRE= MIME-Version: 1.0 Received: by 10.204.80.36 with SMTP id r36mr3787210bkk.75.1274865267000; Wed, 26 May 2010 02:14:27 -0700 (PDT) Received: by 10.204.123.202 with HTTP; Wed, 26 May 2010 02:14:26 -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: Wed, 26 May 2010 11:14:26 +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: Wed, 26 May 2010 09:14:28 -0000 2010/5/25 Giovanni Trematerra : > On Tue, May 25, 2010 at 5:52 PM, David DEMELIER > wrote: >> 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 = when 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 cha= nge. >>>>>>> In your case it happens when you remove AC adaptor. Let's hope some= one 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 w= hen >>>>>> changing profile from ac plugged -> ac unplugged (and not the revers= e) 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 attache= d >>>>> 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. >> > > This is an old one. Could you try acpi_idle5.diff.txt? I kept you in > Cc when I sent to > the list. If you have problems, let me know, I'll resend to you =C2=A0the= patch. > > Thank you. > Hi, it panic'ed with the same backtrace. Thanks. --=20 Demelier David