Re: [PATCH 1/6] UML - Deal with host time going backwards

[Jeremy Fitzhardinge]

Jeff Dike wrote:
> On Wed, Jun 04, 2008 at 03:31:58PM +0100, Jeremy Fitzhardinge wrote:
>   
> > Shouldn't UML use a monotonic host clock for guest timekeeping?
> >     
>
> Indeed, Eric pointed out the posix timers, which I had forgotten
> about.  On the face of it, a monotonic timer should do the trick, but
> it's not obvious how to get it to behave like a monotonic
> gettimeofday...

You can either read the monotonic clock directly, or use it as a time 
source for a monotonic timer.  clock_gettime(CLOCK_MONOTONIC, &ts) will 
return the time in ns, and you can just feed that directly into the 
guest as a clocksource.

   J
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