On 04/02/2015 01:39 PM, Frederic Weisbecker wrote: > TIF_NOHZ is used by context_tracking to force syscall slow-path on every > task in order to track userspace roundtrips. As such, it must be set on > all running tasks. > > It's currently explicitly inherited through context switches. There is > no need to do it on this fast-path though. The flag could be simply > set once for all on all tasks, whether they are running or not. > > Lets do this by setting the flag to init task on early boot and let it > propagate through fork inheritance. > > Suggested-by: Oleg Nesterov <[email protected]> > Signed-off-by: Frederic Weisbecker <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Rik van Riel <[email protected]> > Cc: Paul E. McKenney <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Dave Jones <[email protected]> > Cc: Oleg Nesterov <[email protected]>
Reviewed-by: Rik van Riel <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
