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    SubjectRe: [patch 1/2] x86_64 page fault NMI-safe
    > or similar. Wouldn't that be nice to have as a capability?

    It means the NMI watchdog would get useless if these areas
    become common.

    Again I suspect all of this is not really needed anyways if
    vmalloc_sync_all() works properly. That would solve the original
    problem Mathieu was trying to solve for per_cpu data. The rule
    would be just to call vmalloc_sync_all() properly when changing
    per CPU data too.

    In fact I'm pretty sure it worked originally. Perhaps it regressed?

    -- -- Speaking for myself only.

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