Paul E. McKenney fd2a749d3f
rcutorture: Suppress rtort_pipe_count warnings until after stalls ...
Currently, if rcu_torture_writer() sees fewer than ten grace periods
having elapsed during a call to stutter_wait() that actually waited,
the rtort_pipe_count warning is emitted. This has worked well for
a long time. Except that the rcutorture TREE07 scenario now does a
short-term 14-second RCU CPU stall, which can most definitely case
false-positive rtort_pipe_count warnings.
This commit therefore changes rcu_torture_writer() to compute the
full expected holdoff and stall duration, and to refuse to report any
rtort_pipe_count warnings until after all stalls have completed.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org >
Cc: Frederic Weisbecker <frederic@kernel.org >
Signed-off-by: Boqun Feng <boqun.feng@gmail.com >
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fd2a749d3f