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    From
    SubjectRe: [patch] severe softirq handling performance bug, fix, 2.4.5
    Date
    David S. Miller
    > Ingo Molnar writes:

    >> (unlike bottom halves, soft-IRQs do not preempt kernel code.)
    > ...
    >
    > Since when do we have this rule? :-)
    ...
    > You should check Softirqs on return from every single IRQ.
    > In do_softirq() it will make sure that we won't run softirqs
    > while already doing so or being already nested in a hard-IRQ.
    >
    > Every port works this way, I don't know where you got this "soft-IRQs
    > cannot run when returning to kernel code" rule, it simply doesn't
    > exist.

    After you two argue this out, please toss a note in Documentation.
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