locktorture: With nested locks, occasionally skip main lock
If we're using nested locking to stress things, occasionally skip taking the main lock, so that we can get some different contention patterns between the writers (to hopefully get two disjoint blocked trees) Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: kernel-team@android.com Co-developed-by:Connor O'Brien <connoro@google.com> Signed-off-by:
Connor O'Brien <connoro@google.com> Signed-off-by:
John Stultz <jstultz@google.com> Signed-off-by:
Paul E. McKenney <paulmck@kernel.org>
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