On Wed, 29 Jun 2011, Glauber Costa wrote: > SCHEDSTATS provide a precise source of information about time tasks > spent on a runqueue, but not running (among other things). It is > specially useful for the steal time implementation, because it doesn't > record halt time at all. > > To avoid a hard dependency on schedstats, since it is possible one won't > want to record statistics about all processes running, the previous method > of time measurement on put/load vcpu is kept for !SCHEDSTATS. > > Signed-off-by: Glauber Costa <glommer@xxxxxxxxxx> > CC: Rik van Riel <riel@xxxxxxxxxx> > CC: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> > CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > CC: Avi Kivity <avi@xxxxxxxxxx> > CC: Anthony Liguori <aliguori@xxxxxxxxxx> > CC: Eric B Munson <emunson@xxxxxxxxx> > CC: Marcelo Tosatti <mtosatti@xxxxxxxxxx> Tested-by: Eric B Munson <emunson@xxxxxxxxx>
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