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    SubjectRe: [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX capable hardware"
    On 05/20/2013 11:18 AM, Linus Torvalds wrote:
    > On Mon, May 20, 2013 at 11:13 AM, H. Peter Anvin <hpa@linux.intel.com> wrote:
    >>
    >> Indeed. Looks like we corrupt a random bit in memory on resume.
    >
    > Well, in this case, it's probably the DEBUG_PAGEALLOC that Michal has
    > enabled, which causes a page fault - and then a triple fault - at
    > secondary CPU startup. And the triple fault then results in a reboot.
    > Which explains the symptoms he gets.
    >
    > Without DEBUG_PAGEALLOC it ends up being "just" a single-bit corruption, yes.
    >

    Good, that explains what made it predictable. Score one for
    DEBUG_PAGEALLOC.

    -hpa




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