hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8OIT1
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Add a tag for the task group, to support the tag-based scheduling mechanism.
The tag is used to identify a special task or a type of special tasks, there are many special tasks in the real world, such as foreground and background tasks, online and offline tasks, ect. so, we can identify such special tasks, and execute specific policies.
Signed-off-by: Chen Hui judy.chenhui@huawei.com Signed-off-by: Ren Zhijie renzhijie2@huawei.com Signed-off-by: Hui Tang tanghui20@huawei.com Signed-off-by: Guan Jing guanjing6@huawei.com --- kernel/sched/core.c | 19 +++++++++++++++++++ kernel/sched/sched.h | 3 +++ 2 files changed, 22 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 69524e3c67bd..159e3eb918d8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -10496,6 +10496,13 @@ static void sched_unregister_group(struct task_group *tg) call_rcu(&tg->rcu, sched_free_group_rcu); }
+#ifdef CONFIG_BPF_SCHED +static inline void tg_init_tag(struct task_group *tg, struct task_group *ptg) +{ + tg->tag = ptg->tag; +} +#endif + /* allocate runqueue etc for a new task group */ struct task_group *sched_create_group(struct task_group *parent) { @@ -10516,6 +10523,10 @@ struct task_group *sched_create_group(struct task_group *parent) if (!alloc_rt_sched_group(tg, parent)) goto err;
+#ifdef CONFIG_BPF_SCHED + tg_init_tag(tg, parent); +#endif + alloc_uclamp_sched_group(tg, parent);
return tg; @@ -10603,6 +10614,14 @@ static void sched_change_group(struct task_struct *tsk, struct task_group *group sched_change_qos_group(tsk, group); #endif
+#ifdef CONFIG_BPF_SCHED + /* + * This function has cleared and restored the task status, + * so we do not need to dequeue and enqueue the task again. + */ + tsk->tag = group->tag; +#endif + #ifdef CONFIG_FAIR_GROUP_SCHED if (tsk->sched_class->task_change_group) tsk->sched_class->task_change_group(tsk); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 19fe3c72e3fa..29f9a049fa28 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -419,6 +419,9 @@ struct task_group { struct uclamp_se uclamp[UCLAMP_CNT]; #endif
+#ifdef CONFIG_BPF_SCHED + long tag; +#endif };
#ifdef CONFIG_FAIR_GROUP_SCHED