From owner-freebsd-stable@FreeBSD.ORG Mon May 24 19:43:34 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 907D5106567A for ; Mon, 24 May 2010 19:43:34 +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 132E98FC0C for ; Mon, 24 May 2010 19:43:33 +0000 (UTC) Received: by bwz2 with SMTP id 2so1419335bwz.13 for ; Mon, 24 May 2010 12:43:33 -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=DQyKIkRpTcL8rWrW2AjVyiQI3DCrkyAJxYBktRhBbTM=; b=J8ZzNm1M8R8ue+Kof87S/9EfTAwBEDQcZtYJC5i9ooelChjL9fBkJf0mbaSRXuE+pa 41TrdnKN0nEhWSfde74h821tYBnYpphQ3jk7cJdsX6KGo/SoMNRGLP8+O5ov70LTh7WY z62dU3NDlTclKkrePU6CLsCtWMlLnz4OwC9X0= 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=Zvr2SW6GKQsWK7Cx5lx1DAIELPDrrSxSJNYDEDAd48SA6CsjGz5+vNPZLplcUBij7n YFzZOpkB3TX1m6VQUo52sxkN05+BCpzJHkwfEEqpUuRlecWF6+EYAv4OOwlWDnPNvvFG pCyKqBrIc429JKFyBuD1c8d1mOU4wqi1ZKFlQ= MIME-Version: 1.0 Received: by 10.204.10.8 with SMTP id n8mr2539776bkn.86.1274730212895; Mon, 24 May 2010 12:43:32 -0700 (PDT) Received: by 10.204.123.202 with HTTP; Mon, 24 May 2010 12:43:32 -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: Mon, 24 May 2010 21:43:32 +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: Mon, 24 May 2010 19:43:34 -0000 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=A9= crit : >>> 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 change. >>> In your case it happens when you remove AC adaptor. Let's hope someone = 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 when >> 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 c= all 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 Cheers. --=20 Demelier David