Commit c835db9d authored by Cheng Yu's avatar Cheng Yu
Browse files

sched/fair: Add group_steal in cmdline to enable STEAL for cgroup 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IAQWPQ



-----------------------------------------

We add a new parameter group_steal in cmdline to enable the steal task
feature for cgroup. That is, when group_steal is not configured in
cmdline, it means the feature is enabled globally; after configuration,
it can be enabled only for a certain cgroup.

Signed-off-by: default avatarCheng Yu <serein.chengyu@huawei.com>
parent 39148316

kernel/sched/fair.c

+8 −0
Original line number Diff line number Diff line
@@ -4459,6 +4459,14 @@ static inline void rq_idle_stamp_clear(struct rq *rq) 
}



#ifdef CONFIG_SCHED_STEAL

DEFINE_STATIC_KEY_FALSE(group_steal);



static int __init group_steal_setup(char *__unused)

{

	static_branch_enable(&group_steal);

	return 1;

}

__setup("group_steal", group_steal_setup);



static inline bool steal_enabled(void)

{

kernel/sched/sched.h

+9 −0
Original line number Diff line number Diff line
@@ -1775,6 +1775,15 @@ extern void set_sched_cluster(void); 
static inline void set_sched_cluster(void) { }

#endif



#ifdef CONFIG_SCHED_STEAL

DECLARE_STATIC_KEY_FALSE(group_steal);



static inline bool group_steal_used(void)

{

	return static_branch_unlikely(&group_steal);

}

#endif



#ifdef CONFIG_NUMA

#ifdef CONFIG_SCHED_STEAL

extern struct static_key_true sched_steal_allow;