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| author | Paul E. McKenney <paulmck@kernel.org> | 2023-03-17 17:22:27 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-04-04 08:35:56 -0700 |
| commit | 574dc1a7efe490dffe5c1ce0285306feec16a880 (patch) | |
| tree | ecd147fec191f8b83ba86e312dff07edb84f2442 /kernel/rcu | |
| parent | a0d8cbd3821369dc9478cabd605417afb9eb24dc (diff) | |
| download | linux-574dc1a7efe490dffe5c1ce0285306feec16a880.tar.gz | |
srcu: Move ->srcu_cb_mutex from srcu_struct to srcu_usage
This commit moves the ->srcu_cb_mutex field 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 <hch@lst.de>
Tested-by: Sachin Sant <sachinp@linux.ibm.com>
Tested-by: "Zhang, Qiang1" <qiang1.zhang@intel.com>
Tested-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/srcutree.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 8428a184d506b..1814f3bfc219d 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -242,7 +242,7 @@ static int init_srcu_struct_fields(struct srcu_struct *ssp, bool is_static) return -ENOMEM; ssp->srcu_sup->srcu_size_state = SRCU_SIZE_SMALL; ssp->srcu_sup->node = NULL; - mutex_init(&ssp->srcu_cb_mutex); + mutex_init(&ssp->srcu_sup->srcu_cb_mutex); mutex_init(&ssp->srcu_gp_mutex); ssp->srcu_idx = 0; ssp->srcu_gp_seq = 0; @@ -861,7 +861,7 @@ static void srcu_gp_end(struct srcu_struct *ssp) int ss_state; /* Prevent more than one additional grace period. */ - mutex_lock(&ssp->srcu_cb_mutex); + mutex_lock(&ssp->srcu_sup->srcu_cb_mutex); /* End the current grace period. */ spin_lock_irq_rcu_node(ssp); @@ -921,7 +921,7 @@ static void srcu_gp_end(struct srcu_struct *ssp) } /* Callback initiation done, allow grace periods after next. */ - mutex_unlock(&ssp->srcu_cb_mutex); + mutex_unlock(&ssp->srcu_sup->srcu_cb_mutex); /* Start a new grace period if needed. */ spin_lock_irq_rcu_node(ssp); |