542e83329d
The default test grace period of two minutes is insufficient in some cases and excessive in others. This commit therefore increases the default to three minutes, but also adds a --shutdown-grace parameter to allow the default to be overridden. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>