Messages in this thread Patch in this message | | | From | Parth Shah <> | Subject | [PATCH v4 2/4] sched/core: Propagate parent task's latency requirements to the child task | Date | Mon, 24 Feb 2020 14:29:16 +0530 |
| |
Clone parent task's latency_nice attribute to the forked child task.
Reset the latency_nice value to default value when the child task is set to sched_reset_on_fork.
Signed-off-by: Parth Shah <parth@linux.ibm.com> Reviewed-by: Qais Yousef <qais.yousef@arm.com> --- kernel/sched/core.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 377ec26e9159..65b6c00d6dac 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2860,6 +2860,9 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) */ p->prio = current->normal_prio; + /* Propagate the parent's latency requirements to the child as well */ + p->latency_nice = current->latency_nice; + uclamp_fork(p); /* @@ -2876,6 +2879,7 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) p->prio = p->normal_prio = __normal_prio(p); set_load_weight(p, false); + p->latency_nice = DEFAULT_LATENCY_NICE; /* * We don't need the reset flag anymore after the fork. It has * fulfilled its duty: -- 2.17.2
| |