linux-kernel - Re: is kexec on Xen domU possible?

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Message-ID: <CAK7GKxnB933DkO8qM6HxZCbDVNn4ze5Ere7ZWnXxBieYMg88dQ@mail.gmail.com>
Date:	Fri, 19 Jul 2013 07:58:40 -0700
From:	Brandon Philips <brandon@...p.org>
To:	Daniel Kiper <daniel.kiper@...cle.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Eric Biederman <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	virtualization@...ts.linux-foundation.org
Subject: Re: is kexec on Xen domU possible?

On Fri, Jul 19, 2013 at 6:18 AM, Daniel Kiper <daniel.kiper@...cle.com> wrote:
>   - PV guests: there is no support for kexec at this time;
>     Once I wrote an implementatation for that type of guests
>     for one company but according to our agreement I could not
>     publish this code; However, I could use it as a base for
>     publicly available kexec implementation; Currently, I do
>     not have any plans to work on this due to some more important
>     stuff to do; However, question about kexec support for PV
>     guests is raised from time to time and maybe this issue
>     will be much more important than others once,

To do kexec on PV guests is there a dependency on support from the dom0?

e.g. if we recreated your patches and merged them into 3.12 and booted
on a XenServer from a few years ago would it work?

What I want to do is use kexec on existing public cloud providers,
that use Xen, like AWS or Rackspace.

Thanks,

Brandon
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