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    SubjectRe: Softirq priority inversion from "softirq: reduce latencies"
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    From: Peter Hurley <peter@hurleysoftware.com>
    Date: Sat, 27 Feb 2016 12:29:39 -0800

    > Not really. softirq raised from interrupt context will always execute
    > on this cpu and not in ksoftirqd, unless load forces softirq loop abort.

    That guarantee never was specified.

    Or are you saying that by design, on a system under load, your UART
    will not function properly?

    Surely you don't mean that.

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