fqs_stutter Wait time (in seconds) between consecutive bursts
of calls to force_quiescent_state().
+gp_normal Make the fake writers use normal synchronous grace-period
+ primitives.
+
+gp_exp Make the fake writers use expedited synchronous grace-period
+ primitives. If both gp_normal and gp_exp are set, or
+ if neither gp_normal nor gp_exp are set, then randomly
+ choose the primitive so that about 50% are normal and
+ 50% expedited. By default, neither are set, which
+ gives best overall test coverage.
+
irqreader Says to invoke RCU readers from irq level. This is currently
done via timers. Defaults to "1" for variants of RCU that
permit this. (Or, more accurately, variants of RCU that do