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| -rw-r--r-- | Documentation/RCU/rculist_nulls.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst index d40374221d69..a9fc774bc400 100644 --- a/Documentation/RCU/rculist_nulls.rst +++ b/Documentation/RCU/rculist_nulls.rst @@ -10,6 +10,9 @@ objects using SLAB_TYPESAFE_BY_RCU allocations. Please read the basics in Documentation/RCU/listRCU.rst +Using 'nulls' +============= + Using special makers (called 'nulls') is a convenient way to solve following problem : @@ -126,6 +129,9 @@ 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 smp_wmb() in insert function. |