Messages in this thread Patch in this message | | | From | K Prateek Nayak <> | Subject | [PATCH 1/5] task_struct: Add field for per-task userspace scheduler hint | Date | Sat, 10 Sep 2022 16:23:22 +0530 |
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- Add a field named "hint" to store the per-task userspace scheduler hint set via the prctl() interface. - Hints are inherited from parent on fork. Inherited hints can be reset from the same prctl() interface used to set hint to default or any other value. - Hints are best effort case and scheduler doesn't make any guarantees of strictly adhering to it.
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com> --- include/linux/sched.h | 1 + init/init_task.c | 1 + 2 files changed, 2 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h index e7b2f8a5c711..fc953c9e956a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -769,6 +769,7 @@ struct task_struct { int wake_cpu; #endif int on_rq; + unsigned int hint; int prio; int static_prio; diff --git a/init/init_task.c b/init/init_task.c index ff6c4b9bfe6b..f5208e6a1934 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -79,6 +79,7 @@ struct task_struct init_task .static_prio = MAX_PRIO - 20, .normal_prio = MAX_PRIO - 20, .policy = SCHED_NORMAL, + .hint = 0, .cpus_ptr = &init_task.cpus_mask, .user_cpus_ptr = NULL, .cpus_mask = CPU_MASK_ALL, -- 2.25.1
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