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Diffstat (limited to 'releasenotes/notes/add-option-for-fair-locks-b6d660e97683cec6.yaml')
-rw-r--r-- | releasenotes/notes/add-option-for-fair-locks-b6d660e97683cec6.yaml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/releasenotes/notes/add-option-for-fair-locks-b6d660e97683cec6.yaml b/releasenotes/notes/add-option-for-fair-locks-b6d660e97683cec6.yaml new file mode 100644 index 0000000..ad1cd4b --- /dev/null +++ b/releasenotes/notes/add-option-for-fair-locks-b6d660e97683cec6.yaml @@ -0,0 +1,15 @@ +--- +prelude: > + This release includes optional support for fair locks. When fair locks + are specified, blocking waiters will acquire the lock in the order that + they blocked. +features: + - | + We now have optional support for ``fair`` locks. When fair locks are + specified, blocking waiters will acquire the lock in the order that they + blocked. This can be useful to ensure that existing blocked waiters do + not wait indefinitely in the face of large numbers of new attempts to + acquire the lock. When specifying locks as both ``external`` and ``fair``, + the ordering *within* a given process will be fair, but the ordering + *between* processes will be determined by the behaviour of the underlying + OS. |