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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-07-28 22:04:00 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-08-31 14:58:15 +0300 |
| commit | 1c1c1d983e75f53b3e307804a39d17d24310c5f2 (patch) | |
| tree | dc25fb7d30fa26674fcfc7343dbd77ab51c5529f /Documentation/RCU | |
| parent | ed336c6fe4c0110a56f6f237865ff9660de8c598 (diff) | |
| download | linux-1c1c1d983e75f53b3e307804a39d17d24310c5f2.tar.xz | |
doc: Use rcu_barrier() to rate-limit RCU callbacks
The checklist.rst document advises periodic synchronize_rcu() invocations
to prevent callback flooding. However, rcu_barrier() is often a better
choice. This commit therefore adds words to this effect.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU')
| -rw-r--r-- | Documentation/RCU/checklist.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/RCU/checklist.rst b/Documentation/RCU/checklist.rst index 2db206fc3465..178ca7547b98 100644 --- a/Documentation/RCU/checklist.rst +++ b/Documentation/RCU/checklist.rst @@ -305,7 +305,8 @@ over a rather long period of time, but improvements are always welcome! the machine. d. Periodically invoke synchronize_rcu(), permitting a limited - number of updates per grace period. + number of updates per grace period. Better yet, periodically + invoke rcu_barrier() to wait for all outstanding callbacks. The same cautions apply to call_srcu() and kfree_rcu(). |