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    SubjectRe: Hibernation Redesign
    Jeremy Maitin-Shepard wrote:
    > It would indeed be a pain for the new kernel to be loaded and have to
    > use discontiguous memory. The trick is, though, that this is not
    > necessary. Immediately before jumping to the new kernel, the first X
    > bytes (where X is the amount of memory the new kernel will get,
    > typically 16MB or 64MB) of physical memory are backed up into the
    > arbitrary discontiguous pages that are made available. This will not
    > take very long, because copying even 64MB of memory is extremely fast.
    > Then the new kernel is free to use the first X bytes of contiguous
    > physical memory. Problem solved.
    >

    You could also use the paravirt_ops pte hooks to create a mapping from
    linear "physical" addresses to actual machine pages. This is what a Xen
    kernel needs to do, and all the infrastructure will be in place shortly.

    J
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