Messages in this thread | | | From | Ulrich Weigand <> | Subject | Re: [PATCH][2.5][8/14] smp_call_function_on_cpu - s390 | Date | Sat, 15 Feb 2003 23:07:01 +0100 (MET) |
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Zwane Mwaikambo wrote:
> This could be achieved if s390 (or if we had a generic one, this is > another story...) had a for_each_cpu type iterator, which would also > cover aforementioned mask &= cpu_online_map issue, but as an aside, it is > harder to track down lockups from things like IPIs to invalid cpus than a busy loop > waiting for num_cpus.
I'm not sure I understand what you mean here. In any case, at least on S/390, doing a SIGP to an invalid CPU will simply get you an 'not operational' indication (condition code 3), so in fact the only problem *is* the busy loop on num_cpus ...
Bye, Ulrich
-- Dr. Ulrich Weigand weigand@informatik.uni-erlangen.de - 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/
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