Re: is kexec on Xen domU possible?

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On Fri, Jul 19, 2013 at 07:58:40AM -0700, Brandon Philips wrote:
> On Fri, Jul 19, 2013 at 6:18 AM, Daniel Kiper <daniel.kiper@xxxxxxxxxx> 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?

No.

> 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?

No.

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

Look for HVM or PVonHVM guests support in this providers.
Sadly, there is no support for kexec on PV guests.

Daniel
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