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To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Byron Stanoszek <gandalf@winds.org>, Jeremy Jackson <jerj@coplanar.net>,
        linux-kernel@vger.kernel.org
Subject: Re: Faster reboots - calling _start?
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From: ebiederm@xmission.com (Eric W. Biederman)
Date: 06 Apr 2002 14:57:33 -0700
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"Martin J. Bligh" <Martin.Bligh@us.ibm.com> writes:

> > Wouldn't it be easier to just ljmp to the start address of the kernel in
> > memory (the address after the bootloader has done its thing), effectively
> > restarting the kernel from line 1? Or is tehre an issue with some
> > hardware being in an invalid state when doing this?
> 
> Two issues with that:
> 
> 1. I want to be able to boot a different kernel on reboot - this
> is a development machine.
> 
> 2. I believe we free all the __init stuff around the end of
> start_kernel, so the initial functions and data just aren't 
> there any more ... of course that could be changed, but it's
> both a more major change than I really want to do, and it still
> doesn't solve (1) ;-)

Seriously check out my code it should just work unless there are special
apic shutdown rules for NUMAQ machines.

Eric

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