tree e6bbde0be435301f880f6b033ab52a3bb354ab99
parent 468d01bec544286bb5283f012b95b5b84636565b
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1486142820 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1492619357 -0700

rcu: Make RCU_FANOUT_LEAF help text more explicit about skew_tick

If you set RCU_FANOUT_LEAF too high, you can get lock contention
on the leaf rcu_node, and you should boot with the skew_tick kernel
parameter set in order to avoid this lock contention.  This commit
therefore upgrades the RCU_FANOUT_LEAF help text to explicitly state
this.

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