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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-05-13 10:32:10 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2013-06-10 13:42:38 -0700
commitce5f4fc861e84739289c187f147040e6af6599b2 (patch)
treeac365ac7c98ed8dcd67c445c6efff96057fd271b /Documentation/RCU
parent295fde89be1b7dce874c0f38d8bb78975a25d46e (diff)
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> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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