hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8OIT1
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Add a tag for the task, useful to identify the special task. User can use the file system interface to mark different tags for specific workloads. The kernel subsystems can use the set_* helpers to mark it too. The bpf prog obtains the tags to detect different workloads.
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 --- include/linux/sched.h | 4 ++++ init/init_task.c | 3 +++ kernel/sched/core.c | 3 +++ 3 files changed, 10 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h index 9fdd08aa9626..ff76ebfc3d91 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1552,6 +1552,10 @@ struct task_struct { const cpumask_t *select_cpus; #endif
+#ifdef CONFIG_BPF_SCHED + long tag; +#endif + /* * New fields for task_struct should be added above here, so that * they are included in the randomized portion of task_struct. diff --git a/init/init_task.c b/init/init_task.c index ac0c5850f74b..2101c6e3432d 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -213,6 +213,9 @@ struct task_struct init_task #ifdef CONFIG_SECCOMP_FILTER .seccomp = { .filter_count = ATOMIC_INIT(0) }, #endif +#ifdef CONFIG_BPF_SCHED + .tag = 0, +#endif }; EXPORT_SYMBOL(init_task);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 81cf1e396710..69524e3c67bd 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4541,6 +4541,9 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p) p->migration_pending = NULL; #endif init_sched_mm_cid(p); +#ifdef CONFIG_BPF_SCHED + p->tag = 0; +#endif }
DEFINE_STATIC_KEY_FALSE(sched_numa_balancing);