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| author | Peter Zijlstra <peterz@infradead.org> | 2020-09-17 10:38:30 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-11-10 18:38:59 +0100 |
| commit | af449901b84c98cbd84a0113223ba3bcfcb12a26 (patch) | |
| tree | 0580fcc4d04ef7ebaa77a658cba36203668c3e44 /kernel/sched/sched.h | |
| parent | sched: Massage set_cpus_allowed() (diff) | |
| download | linux-af449901b84c98cbd84a0113223ba3bcfcb12a26.tar.xz linux-af449901b84c98cbd84a0113223ba3bcfcb12a26.zip | |
sched: Add migrate_disable()
Add the base migrate_disable() support (under protest).
While migrate_disable() is (currently) required for PREEMPT_RT, it is
also one of the biggest flaws in the system.
Notably this is just the base implementation, it is broken vs
sched_setaffinity() and hotplug, both solved in additional patches for
ease of review.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Link: https://lkml.kernel.org/r/20201023102346.818170844@infradead.org
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 0420d80fb250..72d8e47cf0bb 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1902,14 +1902,16 @@ static inline bool sched_fair_runnable(struct rq *rq) extern struct task_struct *pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf); extern struct task_struct *pick_next_task_idle(struct rq *rq); +#define SCA_CHECK 0x01 +#define SCA_MIGRATE_DISABLE 0x02 +#define SCA_MIGRATE_ENABLE 0x04 + #ifdef CONFIG_SMP extern void update_group_capacity(struct sched_domain *sd, int cpu); extern void trigger_load_balance(struct rq *rq); -#define SCA_CHECK 0x01 - extern void set_cpus_allowed_common(struct task_struct *p, const struct cpumask *new_mask, u32 flags); #endif |