On Fri, 2007-07-06 at 10:34 -0400, Steven Rostedt wrote:
> thing is that in RT an IRQ thread might service a softirq if that
> softirq thread is of the same priority as the IRQ thread. The difference
> between an IRQ thread and a softirq thread is that the IRQ thread may
> migrate but the softirq thread may not. So to do this performance
> enhancement, we need to temporarily pin the IRQ thread to the CPU, which
> is expensive (set_cpus_allowed). This would make it much simpler and
> light weight to implement.
Are there any other reasons?
Daniel
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