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    SubjectRe: [PATCH] x86: fix probe_nr_irqs for xen

    * Jeremy Fitzhardinge <> wrote:

    > > hope we can kill nr_irqs/NR_IRQS
    > When irqs are truely dynamically allocated?

    they in essence already are truly dynamic in tip/master. Not yet
    unconditionally so on x86, we chose to also have a !SPARSEIRQ build
    model to make sure dense IRQ arrays still work fine as well. (that's far
    easier to test and validate than to keep a farm of cross compilers to
    other arches alive.)

    But by all means SPARSEIRQ is the primary and only model on x86.

    We could even plug in the dynamic vector allocator from Alan Mayer now,
    both on 32-bit and on 64-bit x86: Yinghai, any complications expected
    there? I guess we need to unify the local APIC code first.


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