> make the TSC synchronization code more robust, and unify it between
> x86_64 and i386.
>
> The biggest change is the removal of the 'fix up TSCs' code on x86_64
> and i386, in some rare cases it was /causing/ time-warps on SMP systems.
On x86-64 I don't think it can since it doesn't check anymore on sync Intel.
> The new code only checks for TSC asynchronity - and if it can prove a
> time-warp (if it can observe the TSC going backwards when going from one
> CPU to another within a critical section), then the TSC clock-source is
> turned off.
The trouble is that people are using the RDTSC anyways even if the
kernel doesn't. So some synchronization is probably a good idea.
-Andi
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