From: Pavel Machek <pavel@suse.cz>
To: Lukas Hejtmanek <xhejtman@mail.muni.cz>
Cc: Magnus Damm <magnus.damm@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: Machine reboot
Date: Sun, 8 Oct 2006 18:51:25 +0000 [thread overview]
Message-ID: <20061008185125.GE4033@ucw.cz> (raw)
In-Reply-To: <20061005160518.GM2923@mail.muni.cz>
On Thu 05-10-06 18:05:18, Lukas Hejtmanek wrote:
> On Thu, Oct 05, 2006 at 08:58:22PM +0900, Magnus Damm wrote:
> > A long shot, but switching to real mode does not work if the cpu is
> > running in VMX root mode ie on hardware with Intel VT extensions
> > enabled. So if you are using some kind of kernel virtualization module
> > on rather new hardware, consider rmmod:ing the module before
> > rebooting.
> >
> > I'm about to post patches for kexec that fixes this problem, but I'm
> > not sure about the current reboot status.
>
> You are right, I'm using Intel Core 2 Duo processor with DP965LT board that is
> capable of VT extensions. However, I'm using vanilla 2.6.18 kernel in X86_64,
> no additional patches, nor XEN or VMWARE is running (even their modules are
> not loaded). Moreover, SYSRQ-B (emergency reboot) works fine. System graceful
> reboot does not work.
Of course... copy/paste pieces of sysrq-b sequence into regular
sequence to find out what the critical difference is... no, it will
not be easy.
Perhaps your box *likes* to reboot with apic on or something? Perhaps
device_shutdown() breaks your ability to reboot?
--
Thanks for all the (sleeping) penguins.
next prev parent reply other threads:[~2006-10-09 14:25 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-05 10:52 Machine reboot Lukas Hejtmanek
2006-10-05 11:28 ` Jesper Juhl
2006-10-05 13:59 ` Lukas Hejtmanek
2006-10-05 11:58 ` Magnus Damm
2006-10-05 16:05 ` Lukas Hejtmanek
2006-10-08 18:51 ` Pavel Machek [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-10-12 23:24 Aleksey Gorelov
2006-10-12 23:43 ` Auke Kok
2006-10-13 0:05 ` Aleksey Gorelov
2006-10-13 4:08 ` Auke Kok
2006-10-13 9:16 ` Lukas Hejtmanek
2006-10-13 14:36 ` Auke Kok
2006-10-13 15:25 ` Lukas Hejtmanek
2006-10-13 16:22 ` Lukas Hejtmanek
2006-10-13 20:22 ` Aleksey Gorelov
2006-10-13 21:41 ` Lukas Hejtmanek
2006-10-13 23:22 ` Aleksey Gorelov
2006-10-14 10:51 ` Lukas Hejtmanek
2006-10-13 15:30 ` Arjan van de Ven
2006-10-13 16:26 ` Lukas Hejtmanek
2006-10-13 20:27 ` Aleksey Gorelov
2006-10-13 20:30 ` Lukas Hejtmanek
2006-10-13 21:36 ` Aleksey Gorelov
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