tree 5716bb62b38f7c65099ff8bc3142457e60637eb3
parent b163760e37047781b37c412cde54d146ac4b651f
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1277923432 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1282263482 -0700

rcu: add boot parameter to suppress RCU CPU stall warning messages

Although the RCU CPU stall warning messages are a very good way to alert
people to a problem, once alerted, it is sometimes helpful to shut them
off in order to avoid obscuring other messages that might be being used
to track down the problem.  Although you can rebuild the kernel with
CONFIG_RCU_CPU_STALL_DETECTOR=n, this is sometimes inconvenient.  This
commit therefore adds a boot parameter named "rcu_cpu_stall_suppress"
that shuts these messages off without requiring a rebuild (though a
reboot might be needed for those not brave enough to patch their kernel
while it is running).

This message-suppression was already in place for the panic case, so this
commit need only rename the variable and export it via module_param().

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