Messages in this thread | | | Date | Thu, 05 Feb 2015 21:14:36 +0100 | From | Paolo Bonzini <> | Subject | Re: [PATCH RFC] kvm: x86: add halt_poll module parameter |
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On 05/02/2015 20:23, Rik van Riel wrote: >> > 3) long term anyway we want it to auto tune, which is better than tuning >> > it per-VM. > We may want to auto tune it per VM.
We may even want to auto tune it per VCPU.
> However, if we make auto tuning work well, I do not > think we want to expose a user visible tunable per > VM, and commit to keeping that kind of interface > around forever.
Exactly. We probably want module parameters to tune the minimum/maximum values (which includes the special cases of disabling polling altogether, and disabling the autotuning while leaving polling enabled), but committing to a per-VM interface is premature.
Paolo
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