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    SubjectRe: [PATCH v8]: Improve performance of LZO/plain hibernation
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    ------- Original message -------
    > From: Rafael J. Wysocki

    >> I get a kernel panic on a test box using a x86_64 kernel with this patch
    >> applied.
    >
    > The panic happens during late resume, when trying to switch to the
    > hibernated
    > kernel.

    In an effort to test this whole thing a bit more, I took today's kernel
    from Linus' repo and applied v11 of my patch. I compiled this on a single
    cpu machine this time, with 768 MB of memory (in today's terms, this laptop
    would not pass as a smartphone :-), running F-16 beta.. The system has
    radeon graphics (my other system, where I initially developed the patch,
    has intel). Also, this was a 32-bit box, as opposed to my other system,
    which is 64-bit.

    I was getting kernel trouble on repeated hibernate/thaw cycles on both
    systems when KMS was enabled. With nomodeset passed into the kernel, both
    systems would go through 50+ cycles (this was my test loop) with no
    trouble. Whether my patch was applied or not didn't matter - I was getting
    trouble with Fedora supplied kernels as well, after a few cycles.

    So, I don't know for sure, but it seems to me something is amiss in KMS
    when it comes to hibernation.

    --
    Bojan


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