Re: Preemptable Ticket Spinlock

[Rik van Riel]

On 04/22/2013 04:48 PM, Peter Zijlstra wrote:

> Hmm.. it looked like under light overcommit the paravirt ticket lock
> still had some gain (~10%) and of course it brings the fairness thing
> which is always good.
>
> I can only imagine the mess unfair + vcpu preemption can bring to guest
> tasks.

If you think unfairness + vcpu preemption is bad, you haven't
tried full fairness + vcpu preemption :)

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