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| author | SeongJae Park <sj@kernel.org> | 2023-06-16 23:36:26 +0000 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-07-14 14:55:57 -0700 |
| commit | 47d63d7a3918d8bc1ccd0b0527da8dbb66429100 (patch) | |
| tree | fd7e4ec565efea78fb8212752a5ed5168b85af72 /Documentation/RCU/rculist_nulls.rst | |
| parent | d186204a98541c7d693290bfc91853bbfdfcf0cb (diff) | |
Docs/RCU/rculist_nulls: Fix text about atomic_set_release()
The document says we can avoid extra _release() in insert function when
hlist_nulls is used, but that's not true[1]. Drop it.
[1] https://lore.kernel.org/rcu/46440869-644a-4982-b790-b71b43976c66@paulmck-laptop/
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU/rculist_nulls.rst')
| -rw-r--r-- | Documentation/RCU/rculist_nulls.rst | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst index 1fb086066377..21e40fcc08de 100644 --- a/Documentation/RCU/rculist_nulls.rst +++ b/Documentation/RCU/rculist_nulls.rst @@ -140,8 +140,7 @@ very very fast (before the end of RCU grace period) Avoiding extra smp_rmb() ======================== -With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup() -and extra _release() in insert function. +With hlist_nulls we can avoid extra smp_rmb() in lockless_lookup(). For example, if we choose to store the slot number as the 'nulls' end-of-list marker for each slot of the hash table, we can detect @@ -196,6 +195,9 @@ Note that using hlist_nulls means the type of 'obj_node' field of 2) Insert algorithm ------------------- +Same to the above one, but uses hlist_nulls_add_head_rcu() instead of +hlist_add_head_rcu(). + :: /* |