[Xen-devel] [PATCH v2 01/11] kexec: introduce kexec_ops struct

[Ian Campbell]

On Fri, 2012-11-23 at 10:37 +0000, Daniel Kiper wrote:
> On Fri, Nov 23, 2012 at 09:53:37AM +0000, Jan Beulich wrote:
> > >>> On 23.11.12 at 02:56, Andrew Cooper <andrew.cooper3 at citrix.com> wrote:
> > > The crash region (as specified by crashkernel= on the Xen command line)
> > > is isolated from dom0.
> > >[...]
> >
> > But all of this _could_ be done completely independent of the
> > Dom0 kernel's kexec infrastructure (i.e. fully from user space,
> > invoking the necessary hypercalls through the privcmd driver).
> 
> No, this is impossible. kexec/kdump image lives in dom0 kernel memory
> until execution.

Are you sure? I could have sworn they lived in the hypervisor owned
memory set aside by the crashkernel= parameter as Andy suggested.

Ian.