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This commit cites a pertinent RCU-related litmus test. Co-developed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Co-developed-by: Akira Yokosawa <akiyks@gmail.com> [Alan: grammar nit] [ paulmck: Update commit log and title per Akira feedback. ] Suggested-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
34 lines
1.2 KiB
Text
34 lines
1.2 KiB
Text
============
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LITMUS TESTS
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============
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Each subdirectory contains litmus tests that are typical to describe the
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semantics of respective kernel APIs.
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For more information about how to "run" a litmus test or how to generate
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a kernel test module based on a litmus test, please see
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tools/memory-model/README.
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atomic (/atomic derectory)
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--------------------------
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Atomic-RMW+mb__after_atomic-is-stronger-than-acquire.litmus
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Test that an atomic RMW followed by a smp_mb__after_atomic() is
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stronger than a normal acquire: both the read and write parts of
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the RMW are ordered before the subsequential memory accesses.
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Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
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Test that atomic_set() cannot break the atomicity of atomic RMWs.
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RCU (/rcu directory)
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--------------------
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MP+onceassign+derefonce.litmus (under tools/memory-model/litmus-tests/)
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Demonstrates the use of rcu_assign_pointer() and rcu_dereference() to
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ensure that an RCU reader will not see pre-initialization garbage.
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RCU+sync+read.litmus
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RCU+sync+free.litmus
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Both the above litmus tests demonstrate the RCU grace period guarantee
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that an RCU read-side critical section can never span a grace period.
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