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SubjectRe: [PATCH 6/6] don't compute pvclock adjustments if we trust the tsc
On 04/27/2010 04:40 PM, Marcelo Tosatti wrote:
> On Mon, Apr 26, 2010 at 01:46:28PM -0400, Glauber Costa wrote:
>
>> If the HV told us we can fully trust the TSC, skip any
>> correction
>>
>>
> Please drop this. Its not certain what is the best method to reduce
> contention on the global variable. Whatever it is, can be done later.
>
>

The problem is lead time. If we (or the cpu vendors) fix this in the
hypervisor/processors in a year, then we want existing guests to take
advantage of it immediately.

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



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