I'm not sure I understand your question. Lowest Priority delivery mode only
works with logical interrupts. (I've tried it with physical intrs. It fails
miserably.) The "all including self" and "all excluding self" destination
shorthands don't do lowest priority arbitration. They always deliver the
interrupt to the CPUs mentioned in the shortand.
Lowest priority delivery mode isn't _too_ useful in Linux yet. It would be
nice to preferentially target idle CPUs with interrupts in real time. That
means changing each CPU's Task Priority Register (TPR) to represent how busy
it is. I've got some patches to do that, but haven't posted them as anything
more than a RFC.
-- James Cleverdon IBM xSeries Linux Solutions {jamesclv(Unix, preferred), cleverdj(Notes)} at us dot ibm dot com- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/