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    SubjectRe: [Xen-devel] incorrect layout of globals from head_64.S during kexec boot
    On Tue, Jul 10, Ian Campbell wrote:

    > On Tue, 2012-07-10 at 10:51 -0400, Konrad Rzeszutek Wilk wrote:
    > > On Tue, Jul 10, 2012 at 08:46:34AM -0600, Ian Campbell wrote:
    > > > On Tue, 2012-07-10 at 10:14 -0400, Konrad Rzeszutek Wilk wrote:
    > > > > Which brings me to another question - say we do use this patch, what
    > > > > if the decompressor overwrites the old kernels .data section. Won't
    > > > > we run into this problem again?
    > > >
    > > > I've not really been following this thread that closely but wouldn't the
    > > > right answer be for the original kernel to unmap the shared info on
    > > > kexec? Or maybe remap it up to some high/reserved address? Can it read
    > >
    > > That would be the right answer I think, but I don't see the a VCPU_deregister
    > > call (only VCPU_register).
    >
    > Is the issue here vcpuinfo or the shared info (or both)?

    shared info is the issue in PVonHVM.

    Olaf


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