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

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Message-ID: <20131011153727.GA30181@srcf.ucam.org>
Date:	Fri, 11 Oct 2013 16:37:27 +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 08:52:06AM -0400, Vivek Goyal wrote:
> On Fri, Oct 11, 2013 at 01:04:55PM +0200, Daniel Kiper wrote:
> 
> [..]
> > > In theory you can swap between to kernels with the preserve_context
> > > case.  Technically I like the ability but I don't know that it has ever
> > > achieved much uptake.
> > 
> > I think that this is nice idea too. However, I have not seen its usage in real.
> > Even once there was an idea to remove that stuff from Linux Kernel.
> 
> I have not seen anybody using it. I don't even know if it works or not.

It works. I'm using it.

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