Re: x86, vmi: TSC going backwards check in vmi clocksource

[Ingo Molnar]

* Alok Kataria <akataria@xxxxxxxxxx> wrote:

> On Thu, 2009-02-19 at 03:18 -0800, Ingo Molnar wrote:
> > * Alok Kataria <akataria@xxxxxxxxxx> wrote:
> > 
> > > From: Alok N Kataria <akataria@xxxxxxxxxx>
> > > 
> > > Similar to the check for TSC going backwards in the TSC 
> > > clocksource, we also need this check for VMI clocksource.
> > 
> > ok. Precisely what kind of bug/symptoms does this fix?
> 
> If the read CYCLES_REAL counter value is less than the cycle_last value,
> it may result in time jumps.
> I also saw some messages about  process being stuck for more than
> 120sec, which was traced back to this.

Applied to tip:x86/urgent, thanks Alok!

	Ingo
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