rcutorture: Suppress rtort_pipe_count warnings until after stalls

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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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Paul E. McKenney 2024-01-03 10:59:25 -08:00 • committed by Boqun Feng

parent 67050837ec

commit fd2a749d3f

1 changed files with 9 additions and 4 deletions

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kernel/rcu/rcutorture.c

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