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SubjectRe: exclusive cpusets broken with cpu hotplug
Dinakar wrote:
> I have a patch (though a very old one...) for handling hotplug and cpusets.
> However there were some ugly locking issues and nesting of locks ...

The interaction of cpusets and hotplug should be in good shape. Look
in kernel/cpuset.c for CONFIG_HOTPLUG_CPU and CONFIG_MEMORY_HOTPLUG,
and you will see the two routines to call for cpu and memory hotplug
events, cpuset_handle_cpuhp() and cpuset_track_online_nodes().

The problem area is the interaction of dynamic sched domains and
cpusets with hot plug events.

--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
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