commit e546f485e1d7520ca0200502cdcc11b503f4805c
author Lai Jiangshan <laijs@cn.fujitsu.com> Mon Jun 21 16:57:42 2010 +0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> Thu Aug 19 17:18:01 2010 -0700
tree 14a62f4f56eb6bb96f2621b5334dac5a3c5c4160
parent 84483ea42cd4f2781d6e97a83ab3ebd0ff19fb10

rcutorture: add random preemption

Add random preemption to help we to torture the preemptable rcu.

srcu_read_delay() also calls rcu_read_delay() for shorter delays.

Added comment to preempt_schedule() call indicating that no quiescent
states happen if preemption is disabled.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>