Date: Wed, 26 May 2010 15:55:11 +0200 From: Giovanni Trematerra <giovanni.trematerra@gmail.com> To: David DEMELIER <demelier.david@gmail.com> Cc: Brandon Gooch <jamesbrandongooch@gmail.com>, freebsd-stable@freebsd.org Subject: Re: Kernel panic when unpluggin AC adaptor Message-ID: <AANLkTilfQjZjJACh1dj7XEHN7uZ36_8N0uh5sX_4eOHk@mail.gmail.com> In-Reply-To: <AANLkTikQygqvB93L8RjGYF2k8ouIjzLFvxUJTuoOPWhc@mail.gmail.com> References: <4DEBDE2C-C0D2-469D-AC42-DD5027926424@FreeBSD.org> <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> <AANLkTin7cURd4nS5de7lmtY3igFGGynd1w85Ywj2NCK3@mail.gmail.com> <AANLkTikQygqvB93L8RjGYF2k8ouIjzLFvxUJTuoOPWhc@mail.gmail.com>
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On Wed, May 26, 2010 at 12:01 PM, David DEMELIER <demelier.david@gmail.com> wrote: > 2010/5/26 Giovanni Trematerra <giovanni.trematerra@gmail.com>: >> 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@gma= il.com> wrote: >>>>>>>>> Le Vendredi 07 mai 2010 =E0 18:22 +0200, Giovanni Trematerra a = =E9crit : >>>>>>>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David <demelier.david@g= mail.com> wrote: >>>>>>>>>> > Hi, >>>>>>>>>> > =A0 =A0 =A0 =A0I noticed that pluggin the AC adaptor when I bo= ot 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 = change. >>>>>>>>>> In your case it happens when you remove AC adaptor. Let's hope s= omeone on >>>>>>>>>> acpi@ ml comes up with a good idea. >>>>>>>>>> >>>>>>>>> >>>>>>>>> Okay so for the moment no change, I'll wait for someone with an i= dea >>>>>>>>> that could solve my problem. For me because the panic only happen= s when >>>>>>>>> changing profile from ac plugged -> ac unplugged (and not the rev= erse) 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 allocat= e a >>>>>>>> new cx_ptr->p_lvlx =A0via acpi_PkgGas. >>>>>>>> If acpi_PkgGas set cx_ptr->p_lvlx to NULL for any reasons you'll h= ave >>>>>>>> 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 betw= een >>>>>>>> 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 atta= ched >>>>>>>> patch, just to be >>>>>>>> sure that we catch it. >>>>>>>> >>>>>>> >>>>>>> Hi, it paniced today ! I don't know why it randomly panic but it di= d, >>>>>>> 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 adapte= r. >>>>> >>>> >>>> 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= patch. >>>> >>>> Thank you. >>>> >>> >>> Hi, it panic'ed with the same backtrace. >>> >> >> Can you please post your dmesg? >> > > Sent ! As your PC is in a good mood to make test, :) could you try this patch? Thank you -- Gianni
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