From owner-freebsd-stable@FreeBSD.ORG Tue May 25 21:29:17 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 16CD21065885 for ; Tue, 25 May 2010 21:29:17 +0000 (UTC) (envelope-from giovanni.trematerra@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 91E1A8FC13 for ; Tue, 25 May 2010 21:29:16 +0000 (UTC) Received: by fxm17 with SMTP id 17so907376fxm.13 for ; Tue, 25 May 2010 14:29:15 -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=sNn2a6cT8rryIZYXEBHLtpmA7C52xvjYHLuYSizeTeY=; b=E9z/dpLZekm2wOKN91JLiu5CcMfIQvNpOK1/Gdh+8twSwRCVlHjytaTCvW1zySjY++ ZFNppRGK2vo9Njwwcz9x5muE6R2KA1jNQdx9X33ifs+MPkcMImQ4yfDFaG25LNG5zWRw gDNjleUmB91/4czquZbUrgy9MTxNcab6Bf2v4= 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=pDE1ObulVhMXSu3ZIY40RmDdFrPveuNSXszArCJ9zkFh6f8bRfUaDUiNp78yhQ/IQq zpF3W4+wG4X6sP5XUVYt9QlaYVh51oG+8fhM1bcxnTQzyUGM/Z0TFHqCj6QFW91Z3FbF EDg89OuxcQZkpgFy9jUxCXp5OmQERhGyHNJg8= MIME-Version: 1.0 Received: by 10.223.60.3 with SMTP id n3mr6781128fah.83.1274822955432; Tue, 25 May 2010 14:29:15 -0700 (PDT) Received: by 10.223.103.209 with HTTP; Tue, 25 May 2010 14:29:14 -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 23:29:14 +0200 Message-ID: From: Giovanni Trematerra To: David DEMELIER Content-Type: text/plain; charset=ISO-8859-1 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 21:29:17 -0000 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 =E0 18:22 +0200, Giovanni Trematerra a =E9cri= t : >>>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David wrote: >>>>>> > Hi, >>>>>> > =A0 =A0 =A0 =A0I noticed that pluggin the AC adaptor when I boot w= ithout it does not >>>>>> > =A0 =A0 =A0 =A0panic. It only panic when removing it. >>>>>> > >>>>>> > =A0 =A0 =A0 =A0Maybe that could help ? >>>>>> > >>>>>> >>>>>> Good to know. The problem lies somewhere when performance state chan= ge. >>>>>> In your case it happens when you remove AC adaptor. Let's hope someo= ne 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 wh= en >>>>> 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 =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. > 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 the patch. Thank you. -- Gianni