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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-12-11 20:55:17 +0100 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2024-02-14 16:53:50 +0100 |
| commit | 56823e9f60f0eedb9981f28b664232a9cace1015 (patch) | |
| tree | 8b438539f0db581dd47e432b0a2c669a75d1a8ab /Documentation/RCU | |
| parent | context_tracking: Fix kerneldoc headers for __ct_user_{enter,exit}() (diff) | |
| download | linux-56823e9f60f0eedb9981f28b664232a9cace1015.tar.xz linux-56823e9f60f0eedb9981f28b664232a9cace1015.zip | |
doc: Clarify use of slab constructors and SLAB_TYPESAFE_BY_RCU
This commit explicitly states that you should initialize any locks to
be used by readers in your SLAB_TYPESAFE_BY_RCU constructor.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'Documentation/RCU')
| -rw-r--r-- | Documentation/RCU/whatisRCU.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/RCU/whatisRCU.rst b/Documentation/RCU/whatisRCU.rst index 246ce0d0b4d1..872ac665223f 100644 --- a/Documentation/RCU/whatisRCU.rst +++ b/Documentation/RCU/whatisRCU.rst @@ -963,8 +963,8 @@ unfortunately any spinlock in a ``SLAB_TYPESAFE_BY_RCU`` object must be initialized after each and every call to kmem_cache_alloc(), which renders reference-free spinlock acquisition completely unsafe. Therefore, when using ``SLAB_TYPESAFE_BY_RCU``, make proper use of a reference counter. -(Those willing to use a kmem_cache constructor may also use locking, -including cache-friendly sequence locking.) +(Those willing to initialize their locks in a kmem_cache constructor +may also use locking, including cache-friendly sequence locking.) With traditional reference counting -- such as that implemented by the kref library in Linux -- there is typically code that runs when the last |