rcutorture: More thoroughly test nested readers

Currently, nested readers occur only when a timer handler interrupts a
reader.  This is rare, and is thus insufficient testing of the transition
between nesting levels.  This commit therefore causes rcutorture nested
readers to be the rule rather than the exception.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-09-22 20:49:12 -07:00
commit 1c3d53986f