Commit-ID: 9963185c04727769913a2758c0fcccb821c77098 Gitweb: http://git.kernel.org/tip/9963185c04727769913a2758c0fcccb821c77098 Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> AuthorDate: Mon, 23 Jun 2014 11:52:59 -0700 Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> CommitDate: Tue, 8 Jul 2014 08:32:56 -0700 documentation: Add pointer to percpu-ref for RCU and refcount Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx> Reviewed-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx> --- Documentation/RCU/rcuref.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/RCU/rcuref.txt b/Documentation/RCU/rcuref.txt index 141d531..613033f 100644 --- a/Documentation/RCU/rcuref.txt +++ b/Documentation/RCU/rcuref.txt @@ -1,5 +1,14 @@ Reference-count design for elements of lists/arrays protected by RCU. + +Please note that the percpu-ref feature is likely your first +stop if you need to combine reference counts and RCU. Please see +include/linux/percpu-refcount.h for more information. However, in +those unusual cases where percpu-ref would consume too much memory, +please read on. + +------------------------------------------------------------------------ + Reference counting on elements of lists which are protected by traditional reader/writer spinlocks or semaphores are straightforward: -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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