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Diffstat (limited to 'Documentation')
| -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 @@ | |||
| 1 | Reference-count design for elements of lists/arrays protected by RCU. | 1 | Reference-count design for elements of lists/arrays protected by RCU. |
| 2 | 2 | ||
| 3 | |||
| 4 | Please note that the percpu-ref feature is likely your first | ||
| 5 | stop if you need to combine reference counts and RCU. Please see | ||
| 6 | include/linux/percpu-refcount.h for more information. However, in | ||
| 7 | those unusual cases where percpu-ref would consume too much memory, | ||
| 8 | please read on. | ||
| 9 | |||
| 10 | ------------------------------------------------------------------------ | ||
| 11 | |||
| 3 | Reference counting on elements of lists which are protected by traditional | 12 | Reference counting on elements of lists which are protected by traditional |
| 4 | reader/writer spinlocks or semaphores are straightforward: | 13 | reader/writer spinlocks or semaphores are straightforward: |
| 5 | 14 | ||