From 208f41b1312443401353bec0c1939e2bfc28adce Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 17 Mar 2023 14:43:08 -0700 Subject: srcu: Move ->level from srcu_struct to srcu_usage This commit moves the ->level[] array from the srcu_struct structure to the srcu_usage structure to reduce the size of the former in order to improve cache locality. Suggested-by: Christoph Hellwig Tested-by: Sachin Sant Tested-by: "Zhang, Qiang1" Tested-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- include/linux/srcutree.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h index 276f325f1296..c7373fe5c14b 100644 --- a/include/linux/srcutree.h +++ b/include/linux/srcutree.h @@ -62,14 +62,14 @@ struct srcu_node { */ struct srcu_usage { struct srcu_node *node; /* Combining tree. */ + struct srcu_node *level[RCU_NUM_LVLS + 1]; + /* First node at each level. */ }; /* * Per-SRCU-domain structure, similar in function to rcu_state. */ struct srcu_struct { - struct srcu_node *level[RCU_NUM_LVLS + 1]; - /* First node at each level. */ int srcu_size_state; /* Small-to-big transition state. */ struct mutex srcu_cb_mutex; /* Serialize CB preparation. */ spinlock_t __private lock; /* Protect counters and size state. */ -- cgit