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SubjectRe: [PATCH] lglock: make lg_lock_global() actually lock globally
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On Thu, 2010-08-26 at 21:38 +1000, Nick Piggin wrote:
> I think for CPU plug, stop_machine is reasonable (especially
> considering it is required in unload, which means any frequent
> amount of cpu plug activity already will require stop_machine to
> run anyway).

How is it required?

Its currently implemented as such, and its sure a lot easier to do that
way, but I could imagine that unplugging a CPU could be done without it.




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