diff options
| author | David Dai <david.dai@linux.dev> | 2025-06-24 15:49:06 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-06-24 13:05:26 -1000 |
| commit | cb444006a625c60e6d4dd3753863c3c74f96aac3 (patch) | |
| tree | 3c0f23267768d24423079005885a9670aae1fad5 /include/linux/sched | |
| parent | e2a37c277c64078d5439693963fb9813fa1e6e9c (diff) | |
sched_ext, rcu: Eject BPF scheduler on RCU CPU stall panic
For systems using a sched_ext scheduler and has panic_on_rcu_stall
enabled, try kicking out the current scheduler before issuing a panic.
While there are numerous reasons for RCU CPU stalls that are not
directly attributed to the scheduler, deferring the panic gives
sched_ext an opportunity to provide additional debug info when ejecting
the current scheduler. Also, handling the event more gracefully allows
us to potentially recover the system instead of incurring additional
down time.
Suggested-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: David Dai <david.dai@linux.dev>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/ext.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sched/ext.h b/include/linux/sched/ext.h index 8b92842776cb..0cf0915572c9 100644 --- a/include/linux/sched/ext.h +++ b/include/linux/sched/ext.h @@ -206,12 +206,14 @@ struct sched_ext_entity { void sched_ext_free(struct task_struct *p); void print_scx_info(const char *log_lvl, struct task_struct *p); void scx_softlockup(u32 dur_s); +bool scx_rcu_cpu_stall(void); #else /* !CONFIG_SCHED_CLASS_EXT */ static inline void sched_ext_free(struct task_struct *p) {} static inline void print_scx_info(const char *log_lvl, struct task_struct *p) {} static inline void scx_softlockup(u32 dur_s) {} +static inline bool scx_rcu_cpu_stall(void) { return false; } #endif /* CONFIG_SCHED_CLASS_EXT */ |