tree c4f4d03ca1469f22701b848274034a74c5ae2b04
parent cba6d0d64ee53772b285d0c0c288deefbeaf7775
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1335221573 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1341257600 -0700

rcu: Control RCU_FANOUT_LEAF from boot-time parameter

Although making RCU_FANOUT_LEAF a kernel configuration parameter rather
than a fixed constant makes it easier for people to decrease cache-miss
overhead for large systems, it is of little help for people who must
run a single pre-built kernel binary.

This commit therefore allows the value of RCU_FANOUT_LEAF to be
increased (but not decreased!) via a boot-time parameter named
rcutree.rcu_fanout_leaf.

Reported-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>