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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-02-01 11:17:54 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2024-05-06 14:28:54 -0700 |
| commit | 293f5bc2717b2178978c0d9ce9584da552279c3b (patch) | |
| tree | 8a8a5f52e527f156738b2eeade44ec6b81f22fa3 /Documentation/litmus-tests/README | |
| parent | d2c470c491719130e9af2e80c1bd7223ac61ee93 (diff) | |
| download | linux-293f5bc2717b2178978c0d9ce9584da552279c3b.tar.gz linux-293f5bc2717b2178978c0d9ce9584da552279c3b.tar.bz2 linux-293f5bc2717b2178978c0d9ce9584da552279c3b.zip | |
Documentation/litmus-tests: Demonstrate unordered failing cmpxchg
This commit adds four litmus tests showing that a failing cmpxchg()
operation is unordered unless followed by an smp_mb__after_atomic()
operation.
Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Will Deacon <will@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jade Alglave <j.alglave@ucl.ac.uk>
Cc: Luc Maranget <luc.maranget@inria.fr>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Akira Yokosawa <akiyks@gmail.com>
Cc: Daniel Lustig <dlustig@nvidia.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: <linux-arch@vger.kernel.org>
Cc: <linux-doc@vger.kernel.org>
Acked-by: Andrea Parri <parri.andrea@gmail.com>
Diffstat (limited to 'Documentation/litmus-tests/README')
| -rw-r--r-- | Documentation/litmus-tests/README | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/litmus-tests/README b/Documentation/litmus-tests/README index 26ca56df0212..6c666f3422ea 100644 --- a/Documentation/litmus-tests/README +++ b/Documentation/litmus-tests/README @@ -21,6 +21,22 @@ Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus Test that atomic_set() cannot break the atomicity of atomic RMWs. NOTE: Require herd7 7.56 or later which supports "(void)expr". +cmpxchg-fail-ordered-1.litmus + Demonstrate that a failing cmpxchg() operation acts as a full barrier + when followed by smp_mb__after_atomic(). + +cmpxchg-fail-ordered-2.litmus + Demonstrate that a failing cmpxchg() operation acts as an acquire + operation when followed by smp_mb__after_atomic(). + +cmpxchg-fail-unordered-1.litmus + Demonstrate that a failing cmpxchg() operation does not act as a + full barrier. + +cmpxchg-fail-unordered-2.litmus + Demonstrate that a failing cmpxchg() operation does not act as an + acquire operation. + locking (/locking directory) ---------------------------- |