On Fri, Jul 19, 2013 at 6:18 AM, Daniel Kiper [off-list ref] 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