cpus_in_xmon questions

[Hollis Blanchard]

On Tuesday, Aug 26, 2003, at 19:27 US/Central, Anton Blanchard wrote:
>
>> Also, what is cpus_in_xmon used for? In xmon/xmon.c, it looks like
>> it's
>> used to prevent a CPU from recursively entering xmon. What could cause
>> that, and would an oops or some sort of message be better there? What
>> prevents a UP CPU from doing the same thing?
>
> That area of code should probably be looked over. Entering xmon
> recursively is bad stuff but we should not lock up silently.

You've seen it happen? How?

And could it happen on UP? AFAICS only SMP is guarded against the
possibility.

--
Hollis Blanchard
IBM Linux Technology Center


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