Messages in this thread Patch in this message | | | From | Vincent Guittot <> | Subject | [PATCH v5 2/7] sched/core: Propagate parent task's latency requirements to the child task | Date | Sun, 25 Sep 2022 16:39:03 +0200 |
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From: Parth Shah <parth@linux.ibm.com>
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.
Also, initialize init_task.latency_nice value with DEFAULT_LATENCY_NICE value
Signed-off-by: Parth Shah <parth@linux.ibm.com> [rebase] Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> --- init/init_task.c | 1 + kernel/sched/core.c | 1 + 2 files changed, 2 insertions(+)
diff --git a/init/init_task.c b/init/init_task.c index ff6c4b9bfe6b..7dd71dd2d261 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -78,6 +78,7 @@ struct task_struct init_task .prio = MAX_PRIO - 20, .static_prio = MAX_PRIO - 20, .normal_prio = MAX_PRIO - 20, + .latency_nice = DEFAULT_LATENCY_NICE, .policy = SCHED_NORMAL, .cpus_ptr = &init_task.cpus_mask, .user_cpus_ptr = NULL, diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4fa4a3ddb4f4..ada2d05bd894 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4559,6 +4559,7 @@ int sched_fork(unsigned long clone_flags, struct task_struct *p) p->prio = p->normal_prio = p->static_prio; 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: -- 2.17.1
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