Date: Tue, 25 May 2010 08:25:28 +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: <AANLkTikOBiz6XI55pEFlG-SS07r7yyz2o9PifWB9vgHB@mail.gmail.com> In-Reply-To: <AANLkTinYntwwReJDB0blprk1TCy7j1xKca0LzTgUJBDe@mail.gmail.com> References: <4DEBDE2C-C0D2-469D-AC42-DD5027926424@FreeBSD.org> <m2l4e6cba831005060216zae79a16bw1d4671ca79294a0c@mail.gmail.com> <i2ub3954bba1005061103ya3dabb7dw2d60d3aab712ed47@mail.gmail.com> <v2tb3954bba1005070134x3cca53c1vc67e5557e680061d@mail.gmail.com> <i2j4e6cba831005070159qa3df06ccw925073a05a1057f7@mail.gmail.com> <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>
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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 =E9crit = : >>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David <demelier.david@gmail.c= om> wrote: >>>> > Hi, >>>> > =A0 =A0 =A0 =A0I noticed that pluggin the AC adaptor when I boot wit= hout 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 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 =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? Thanks -- Gianni
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