Re: Who's doing what with cpu/memory/node hotplug?

[Paul Jackson <pj@sgi.com>]

> Iam not sure what specifically you are looking for ...

I was looking for the short and sweet overview such as you just
presented ;).  Thanks.

I need to start following this hotplug work because it is next door to
the cpu/memory placement work that I am most focused on, such as
cpusets, led by Simon Derr of Bull, sitting on top of sched_setaffinity
and Andi Kleen's numa work.  A cpuset is a set of cpu and memory
resources that several tasks share, perhaps exclusively (all other
tasks kept out).

At some point, questions such as "what happens when a node is unplugged
from a cpuset" will need to be answered.  And even earlier, "what happens
when a cpu is unplugged that was in a tasks cpus_allowed, or a memory
node unplugged, that was in a vma's list of allowed memory zones."

Or perhaps the answers to these questions are already known ??

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@sgi.com> 1.650.933.1373


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