tree 51eaa45a16731b22797ed88d34584c8b6d55cc01
parent 091541bbdb9906349481a504e7d8e7fa89f6b6bb
author Paul E. McKenney <paul.mckenney@linaro.org> 1326233604 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1329843816 -0800

rcu: Limit lazy-callback duration

Currently, a given CPU is permitted to remain in dyntick-idle mode
indefinitely if it has only lazy RCU callbacks queued.  This is vulnerable
to corner cases in NUMA systems, so limit the time to six seconds by
default.  (Currently controlled by a cpp macro.)

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