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    SubjectRe: [RFC][PATCH] Randomize kernel base address on boot

    * Dave Jones <davej@redhat.com> wrote:

    > On Thu, May 26, 2011 at 03:32:13PM -0700, H. Peter Anvin wrote:
    > > On 05/26/2011 03:18 PM, Rafael J. Wysocki wrote:
    > > >
    > > > Well, as far as I can tell, this feature is going to break hibernation on
    > > > both x86_32 and x86_64 at the moment, unless you can guarantee that the
    > > > randomized kernel location will be the same for both the boot and the target
    > > > kernels.
    > > >
    > >
    > > Obviously we can't and we don't. I'm a bit surprised at that
    > > constraint... how can that constraint not break things like kernels of
    > > slightly different size?
    >
    > In Fedora at least, we make sure the kernel you thaw from is the
    > same one you booted by diddling with grub to force the right kernel
    > to be booted.

    Btw., the hibernation code should save a signature and make sure that
    the two kernels match! It's really broken if the code allows blind
    thawing ...

    Thanks,

    Ingo


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