kexec: Clearing registers just before jumping into purgatory

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Subject: kexec: Clearing registers just before jumping into purgatory
From: mjg59@xxxxxxxxxxxxx (Matthew Garrett)
Date: Fri, 11 Oct 2013 16:48:05 +0100
In-reply-to: <20131011154450.GB2772@redhat.com>
References: <20131011092837.GZ3626@debian70-amd64.local.net-space.pl> <877gdkce6s.fsf@tw-ebiederman.twitter.com> <20131011110455.GA3626@debian70-amd64.local.net-space.pl> <20131011125206.GA2772@redhat.com> <20131011153727.GA30181@srcf.ucam.org> <20131011154450.GB2772@redhat.com>

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 at srcf.ucam.org

Follow-Ups:
- kexec: Clearing registers just before jumping into purgatory
  - From: Richard Weinberger

References:
- kexec: Clearing registers just before jumping into purgatory
  - From: Daniel Kiper
- kexec: Clearing registers just before jumping into purgatory
  - From: Eric W. Biederman
- kexec: Clearing registers just before jumping into purgatory
  - From: Daniel Kiper
- kexec: Clearing registers just before jumping into purgatory
  - From: Vivek Goyal
- kexec: Clearing registers just before jumping into purgatory
  - From: Matthew Garrett
- kexec: Clearing registers just before jumping into purgatory
  - From: Vivek Goyal

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