linux-kernel - Re: kexec: Clearing registers just before jumping into purgatory

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Message-ID: <20131011154805.GB30181@srcf.ucam.org>
Date:	Fri, 11 Oct 2013 16:48:05 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Daniel Kiper <daniel.kiper@...cle.com>, ebiederm@...ssion.com,
	hbabu@...ibm.com, hpa@...ux.intel.com, keescook@...omium.org,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	david.vrabel@...rix.com, jbeulich@...e.com, keir@....org,
	xen-devel@...ts.xen.org
Subject: Re: kexec: Clearing registers just before jumping into purgatory

On Fri, Oct 11, 2013 at 11:44:50AM -0400, Vivek Goyal wrote:

> Just Curious. How is it useful. IOW, what's your use case of booting a new
> kernel and then jumping back.

I'm kexecing into a kernel with a modified /dev/mem, modifying the 
original kernel and then jumping back into it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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