Re: [PATCH 2/2] cpuhotplug: make get_online_cpus() scalability byusing percpu counter

[Lai Jiangshan]

Peter Zijlstra wrote:
> On Mon, 2010-04-12 at 20:30 +0800, Lai Jiangshan wrote:
>> Because read-preference RWL will cause write site starvation.
> 
> Sure, but why is that a problem? Hotplug should be a rare event,


> who cares if it takes a while to come through.

It is totally starvation, hotplug can not complete.
I think it is a kind of DOS attack.
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