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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-06-23 11:52:59 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-07-08 08:32:56 -0700 |
| commit | 9963185c04727769913a2758c0fcccb821c77098 (patch) | |
| tree | 02df78882e8f5d9044c5e5772bca0a82fcab623c /Documentation/RCU/rcuref.txt | |
| parent | 128ea442b12ba63614dccc9b54726cf753aa4758 (diff) | |
| download | linux-stable-9963185c04727769913a2758c0fcccb821c77098.tar.gz linux-stable-9963185c04727769913a2758c0fcccb821c77098.tar.bz2 linux-stable-9963185c04727769913a2758c0fcccb821c77098.zip | |
documentation: Add pointer to percpu-ref for RCU and refcount
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Diffstat (limited to 'Documentation/RCU/rcuref.txt')
| -rw-r--r-- | Documentation/RCU/rcuref.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/RCU/rcuref.txt b/Documentation/RCU/rcuref.txt index 141d531aa14b..613033ff2b9b 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: |