diff options
| author | Frederic Weisbecker <[email protected]> | 2020-11-13 13:13:19 +0100 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2021-01-06 16:24:19 -0800 |
| commit | d97b078182406c0bd0aacd36fc0a693e118e608f (patch) | |
| tree | 88d524c2c60c23eaded9d879db8c2c034051247f /include/linux | |
| parent | 126d9d49528dae792859e5f11f3b447ce8a9a9b4 (diff) | |
rcu/nocb: De-offloading CB kthread
To de-offload callback processing back onto a CPU, it is necessary to
clear SEGCBLIST_OFFLOAD and notify the nocb CB kthread, which will then
clear its own bit flag and go to sleep to stop handling callbacks. This
commit makes that change. It will also be necessary to notify the nocb
GP kthread in this same way, which is the subject of a follow-on commit.
Cc: Josh Triplett <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Neeraj Upadhyay <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Inspired-by: Paul E. McKenney <[email protected]>
Tested-by: Boqun Feng <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
[ paulmck: Add export per kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/rcupdate.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index de0826411311..40266eb418b6 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -104,8 +104,10 @@ static inline void rcu_user_exit(void) { } #ifdef CONFIG_RCU_NOCB_CPU void rcu_init_nohz(void); +int rcu_nocb_cpu_deoffload(int cpu); #else /* #ifdef CONFIG_RCU_NOCB_CPU */ static inline void rcu_init_nohz(void) { } +static inline int rcu_nocb_cpu_deoffload(int cpu) { return 0; } #endif /* #else #ifdef CONFIG_RCU_NOCB_CPU */ /** |