tree 2aa48f0db717ae7741602022e4020f22cc3cea7f
parent 27565d64a4e564e72c22d8c91a3cfcb9442383e8
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1326497538 -0800
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1329843828 -0800

rcu: Set RCU CPU stall times via sysfs

The default CONFIG_RCU_CPU_STALL_TIMEOUT value of 60 seconds has served
Linux users well for production use for quite some time.  However, for
debugging, there will be more than three minutes between subsequent
stall-warning messages.  This can be an annoyingly long wait if you
are trying to work out where the offending infinite loop is hiding.

Therefore, this commit provides a rcu_cpu_stall_timeout sysfs
parameter that may be adjusted at boot time and at runtime to speed
up debugging.

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