Re: [PATCH 1/5] Add a global synchronization point for pvclock

Avi Kivity
2010-04-20T09:39:15Z

On 04/19/2010 09:35 PM, Zachary Amsden wrote:
>>>> Sockets and boards too? (IOW, how reliable is TSC_RELIABLE)?
>>> Not sure, IIRC we clear that when the TSC sync test fails, eg when we
>>> mark the tsc clocksource unusable.
>>
>> Worrying. By the time we detect this the guest may already have
>> gotten confused by clocks going backwards.
>
>
> Upstream, we are marking the TSC unstable preemptively when hardware
> which will eventually sync test is detected, so this should be fine.

ENOPARSE?

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.