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    SubjectRe: [RFC] Asynchronous Messaging
    > This is accomplished by allocating a page (or more) of memory which
    > is executable and mapped into every threads address space. Also, all
    > ISR entry points are modified to detect if the code that was interrupted
    > was executing within the ACE page. If it was then the ACE code is
    > allowed to complete before the ISR continues. This then provides
    > the guarantee of atomic execution.

    What if you enter the ISR, pass the point of the check and then another
    CPU core hits the ACE space ?

    Also how do you handle the case where the code gets stuck in your atomic
    pages ?

    Alan
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