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| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-03-08 18:34:07 +0100 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-04-15 19:47:51 +0200 |
| commit | 462df2f543ae360e79fcaa1b498d2a1a0c2a5b63 (patch) | |
| tree | 75d6f47289d665dd2296e4fc59670bcf4909293f /kernel/rcu/tree.h | |
| parent | 2053937a310a3982de9d33af3db2dbd2b32b66e4 (diff) | |
rcu: Support direct wake-up of synchronize_rcu() users
This patch introduces a small enhancement which allows to do a
direct wake-up of synchronize_rcu() callers. It occurs after a
completion of grace period, thus by the gp-kthread.
Number of clients is limited by the hard-coded maximum allowed
threshold. The remaining part, if still exists is deferred to
a main worker.
Link: https://lore.kernel.org/lkml/Zd0ZtNu+Rt0qXkfS@lothringen/
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index b942b9437438..2832787cee1d 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -315,6 +315,12 @@ do { \ __set_current_state(TASK_RUNNING); \ } while (0) +/* + * A max threshold for synchronize_rcu() users which are + * awaken directly by the rcu_gp_kthread(). Left part is + * deferred to the main worker. + */ +#define SR_MAX_USERS_WAKE_FROM_GP 5 #define SR_NORMAL_GP_WAIT_HEAD_MAX 5 struct sr_wait_node { |