Re: [PATCH -tip] v9 scalable classic RCU implementation

[Andi Kleen]

> On Power, I see a hang in all three flavors of RCU when CPU hotplug
> is enabled and dynticks is not.  I have not yet seen this hang on x86.
> On Power, the hang occurs in the CPU-offline code, and is identical to
> the hangs I was seeing in 2.6.27, except that "sleep 1" does not hang
> in recent 2.6.28 versions.  So the timeout is apparently failing to fire
> (or being ignored) for some other reason.
> 
> Is this similar to what you are seeing on x86?

Yes it is.

-Andi
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