is the tickless kernel now the "standard"?

[Michael Blizek]

Hi!

On 11:01 Sun 15 May     , Greg KH wrote:
> On Sun, May 15, 2011 at 01:48:43PM -0400, Robert P. J. Day wrote:
...
> >   ok, good to know.  i assume, then, that it's fairly pointless to use
> > the value of "jiffies" for anything that requires even moderate
> > accuracy.  i was poking around the timer code, and i can see this in
> > kernel/time/timekeeping.c:
> 
> No, never access jiffies directly, use the correct delay and timer
> functions instead, they will handle things properly.  And that's the way
> to get correct accuracy if you need it.

When switchint from jiffies+timers to hrtimers what should be used as a
monotonic time source? ktime_get()? What am I supposed to do if
timekeeping_valid_for_hres() returns 0? Can I ignore this?

What does it mean this highres timer are not available during system startup?
Are they running with lower resolution or not at all?

	-Michi