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    SubjectRe: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)
    Mathieu Desnoyers wrote:
    > * Andi Kleen (andi@firstfloor.org) wrote:
    >> Mathieu Desnoyers <compudj@krystal.dyndns.org> writes:
    >>> It allows placing immediate values (and therefore optimized trace_marks) in NMI
    >>> code
    >> Only if all your trace_mark infrastructure is lock less.
    >>
    >> -Andi
    >>
    >
    > It uses RCU-style updates and has been designed to be lockless from the
    > ground up.

    Wrong. If it causes vmalloc faults it is not lockless.

    -Andi



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