Date: Wed, 26 May 2010 11:34:14 +0200 From: Giovanni Trematerra <giovanni.trematerra@gmail.com> To: David DEMELIER <demelier.david@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: Kernel panic when unpluggin AC adaptor Message-ID: <AANLkTin7cURd4nS5de7lmtY3igFGGynd1w85Ywj2NCK3@mail.gmail.com> In-Reply-To: <AANLkTimf7wzXoTjvdF07pkrUmU9qYVsxpUtbnmaNX6vv@mail.gmail.com> References: <4DEBDE2C-C0D2-469D-AC42-DD5027926424@FreeBSD.org> <20100507120843.GA1738@Melon.malikania.fr> <k2u4e6cba831005070922vfc3bcf18i59551da3b40317a@mail.gmail.com> <1273257226.1671.3.camel@malikania.fr> <AANLkTilcNzzLt2GUPbL_Vqjspzx5a-oem1oZpKAYqoN8@mail.gmail.com> <AANLkTinYntwwReJDB0blprk1TCy7j1xKca0LzTgUJBDe@mail.gmail.com> <AANLkTikOBiz6XI55pEFlG-SS07r7yyz2o9PifWB9vgHB@mail.gmail.com> <AANLkTinpUCeQpayi-ZjMAyJ6tNhXT5PWM0zLsntgbJ3P@mail.gmail.com> <AANLkTik6oKg1jFWD2zoS7fUZzZl-3Pj-EhgGa2xKer94@mail.gmail.com> <AANLkTimf7wzXoTjvdF07pkrUmU9qYVsxpUtbnmaNX6vv@mail.gmail.com>
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On Wed, May 26, 2010 at 11:14 AM, David DEMELIER <demelier.david@gmail.com> wrote: > 2010/5/25 Giovanni Trematerra <giovanni.trematerra@gmail.com>: >> On Tue, May 25, 2010 at 5:52 PM, David DEMELIER >> <demelier.david@gmail.com> wrote: >>> 2010/5/25 Giovanni Trematerra <giovanni.trematerra@gmail.com>: >>>> On Mon, May 24, 2010 at 9:43 PM, David DEMELIER >>>> <demelier.david@gmail.com> wrote: >>>>> 2010/5/12 Giovanni Trematerra <giovanni.trematerra@gmail.com>: >>>>>> On Fri, May 7, 2010 at 8:33 PM, Demelier David <demelier.david@gmail= .com> wrote: >>>>>>> Le Vendredi 07 mai 2010 =E0 18:22 +0200, Giovanni Trematerra a =E9c= rit : >>>>>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David <demelier.david@gma= il.com> wrote: >>>>>>>> > Hi, >>>>>>>> > =A0 =A0 =A0 =A0I noticed that pluggin the AC adaptor when I boot= without 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 ch= ange. >>>>>>>> In your case it happens when you remove AC adaptor. Let's hope som= eone on >>>>>>>> acpi@ ml comes up with a good idea. >>>>>>>> >>>>>>> >>>>>>> Okay so for the moment no change, I'll wait for someone with an ide= a >>>>>>> that could solve my problem. For me because the panic only happens = when >>>>>>> changing profile from ac plugged -> ac unplugged (and not the rever= se) 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 hav= e >>>>>> the panic that you reported. >>>>>> A solution would be to set acpi_cpu_hook to NULL so acpi_cpu_idle wo= n't call it. >>>>>> I need some time to have a patch because of the possible race betwee= n >>>>>> 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 attach= ed >>>>>> 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 =A0the p= atch. >> >> Thank you. >> > > Hi, it panic'ed with the same backtrace. > Can you please post your dmesg? Thanks -- Gianni
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