tree 319b22d48936885eab6d312895bc03212ee3ffd3
parent 879d6083839fb7c97191bb1c2b55e41daedbb728
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1368466330 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1368554194 -0700

nohz_full: Document additional restrictions

This commit calls out the potential for slowing the tick even when there
are multiple runnable processes per CPU,  It also points out that current
mainlined version keeps the tick going on at least one CPU even when all
CPUs are otherwise idle.  Finally, it notes the need for a 1-HZ tick in
order to calculate CPU load, maintain sched average, compute CFS entity
vruntime, compute avenrun, and carry out load balancing.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>