locktorture: Dump CPUs running writer tasks when RCU stalls

This commit force stack dumps of the CPUs running writer tasks when
an RCU CPU stall warning occurs.  This is helpful in the common case
where RCU isn't being stalled by all of those tasks, and thus won't dump
their stacks.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
1 file changed