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    SubjectRe: perf_events: questions about cpu_has_ht_siblings() and offcore support
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    On Fri, Apr 22, 2011 at 4:47 PM, Peter Zijlstra <peterz@infradead.org> wrote:
    > On Fri, 2011-04-22 at 16:41 +0200, Stephane Eranian wrote:
    >> I assume that's because hotplug
    >> cpu is inherently serialized. You cannot have a CPU going offline
    >> and one going online at the same time. is that right?
    >
    > Exactly, that's all serialized under the hotpug mutex
    >
    Ok, thanks.


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