linux-toradex.git/include/linux/srcutree.h, branch v6.4-rc1

Merge branches 'rcu/staging-core', 'rcu/staging-docs' and 'rcu/staging-kfree', remote-tracking branches 'paul/srcu-cf.2023.04.04a', 'fbq/rcu/lockdep.2023.03.27a' and 'fbq/rcu/rcutorture.2023.03.20a' into rcu/staging

2023-04-05T13:50:37+00:00

srcu: Add comments for srcu_size_state

2023-04-05T13:47:18+00:00

The SRCU_SIZE_* names are not self-explanatory, so this commit therefore
adds comments to the definitions.

Signed-off-by: Pingfan Liu 
Cc: Lai Jiangshan 
Cc: "Paul E. McKenney" 
Cc: Frederic Weisbecker 
Cc: Josh Triplett 
Cc: Steven Rostedt 
Cc: Mathieu Desnoyers 
Cc: "Zhang, Qiang1" 
To: rcu@vger.kernel.org
Reviewed-by: Paul E. McKenney 
Reviewed-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney 
Signed-off-by: Joel Fernandes (Google)

srcu: Move work-scheduling fields from srcu_struct to srcu_usage

2023-04-04T15:36:37+00:00

This commit moves the ->reschedule_jiffies, ->reschedule_count, and
->work fields from the srcu_struct structure to the srcu_usage structure
to reduce the size of the former in order to improve cache locality.

However, this means that the container_of() calls cannot get a pointer
to the srcu_struct because they are no longer in the srcu_struct.
This issue is addressed by adding a ->srcu_ssp field in the srcu_usage
structure that references the corresponding srcu_struct structure.
And given the presence of the sup pointer to the srcu_usage structure,
replace some ssp->srcu_usage-> instances with sup->.

[ paulmck Apply feedback from kernel test robot. ]

Link: https://lore.kernel.org/oe-kbuild-all/202303191400.iO5BOqka-lkp@intel.com/
Suggested-by: Christoph Hellwig 
Tested-by: Sachin Sant 
Tested-by: "Zhang, Qiang1" 
Tested-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney

srcu: Move srcu_barrier() fields from srcu_struct to srcu_usage

2023-04-04T15:36:33+00:00

This commit moves the ->srcu_barrier_seq, ->srcu_barrier_mutex,
->srcu_barrier_completion, and ->srcu_barrier_cpu_cnt fields 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

srcu: Move ->sda_is_static from srcu_struct to srcu_usage

2023-04-04T15:36:28+00:00

This commit moves the ->sda_is_static 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 
Tested-by: Sachin Sant 
Tested-by: "Zhang, Qiang1" 
Tested-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney

srcu: Move heuristics fields from srcu_struct to srcu_usage

2023-04-04T15:36:23+00:00

This commit moves the ->srcu_size_jiffies, ->srcu_n_lock_retries,
and ->srcu_n_exp_nodelay fields 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

srcu: Move grace-period fields from srcu_struct to srcu_usage

2023-04-04T15:36:19+00:00

This commit moves the ->srcu_gp_seq, ->srcu_gp_seq_needed,
->srcu_gp_seq_needed_exp, ->srcu_gp_start, and ->srcu_last_gp_end fields
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

srcu: Move ->srcu_gp_mutex from srcu_struct to srcu_usage

2023-04-04T15:36:14+00:00

This commit moves the ->srcu_gp_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 
Tested-by: Sachin Sant 
Tested-by: "Zhang, Qiang1" 
Tested-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney

srcu: Move ->lock from srcu_struct to srcu_usage

2023-04-04T15:36:07+00:00

This commit moves the ->lock 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 
Tested-by: Sachin Sant 
Tested-by: "Zhang, Qiang1" 
Tested-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney

srcu: Move ->srcu_cb_mutex from srcu_struct to srcu_usage

2023-04-04T15:35:56+00:00

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 
Tested-by: Sachin Sant 
Tested-by: "Zhang, Qiang1" 
Tested-by: Joel Fernandes (Google) 
Signed-off-by: Paul E. McKenney