Re: [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock

From: Jeremy Fitzhardinge
Date: Mon Jan 24 2011 - 12:50:14 EST

On 01/22/2011 06:53 AM, Rik van Riel wrote:
> The main question that remains is whether the PV ticketlocks are
> a large enough improvement to also merge those. I expect they
> will be, and we'll see so in the benchmark numbers.

The pathological worst-case of ticket locks in a virtual environment
isn't very hard to hit, so I expect they'll make a huge difference
there. On lightly loaded systems (little or no CPU overcommit) then
they should be close to a no-op.

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