Re: Ktimer / -rt9 (+custom) monotonic_clock going backwards.

[Ingo Molnar]

* john stultz <johnstul@xxxxxxxxxx> wrote:

> > > John, would this cause any problems to keep cycle_t at s64?
> > 
> > I mean at u64.
> 
> Performance would be the only concern. It had been a u64 before I 
> started optimizing the code a bit.

no, this is really a bad optimization that causes unrobustness. 
Correctness and robustness comes first. It is so easy to cause a 
500-1000msec delay in the kernel, due to a bad driver or anything. The 
timekeeping code should not break like that.

	Ingo
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