reboot/kexec in 2.6.38

[Eric W. Biederman]

Cyril Hrubis <metan at ucw.cz> writes:

> Hi!
>> > I got report that  reboot/kexec does not work in recent kernels.
>> >
>> > I tried both kexec and reboot in 2.6.38, and it worked ok. Maybe
>> > config issue?
>> 
>> I think it's config issue. Never heard of this.
>>
>
> I've seen that on my zaurus a month or two ago. When kexeced to pxa-linux-2.6
> then tried to kexec again. The last thing I've seen was Bye on the framebuffer
> console and the machine freezed.

The basic kexec code has been stable and solid for a long time so kexec
failures are almost always hardware interaction problems.

Someone not stopping dma, or someone not putting the hardware in a state
that the next kernel can figure out how to initialize it.

Eric