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Message-ID: <156546731194.17538.15988994782634770420.tglx@nanos.tec.linutronix.de>
Date: Sat, 10 Aug 2019 20:01:51 -0000
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [GIT pull] sched/urgent for 5.3-rc4
Linus,
please pull the latest sched-urgent-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched-urgent-for-linus
up to: 04e048cf09d7: sched/psi: Do not require setsched permission from the trigger creator
Three fixlets for the scheduler:
- Avoid double bandwidth accounting in the push & pull code
- Use a sane FIFO priority for the Pressure Stall Information (PSI) thread.
- Avoid permission checks when setting the scheduler params for the PSI thread
Thanks,
tglx
------------------>
Dietmar Eggemann (1):
sched/deadline: Fix double accounting of rq/running bw in push & pull
Peter Zijlstra (1):
sched/psi: Reduce psimon FIFO priority
Suren Baghdasaryan (1):
sched/psi: Do not require setsched permission from the trigger creator
kernel/sched/deadline.c | 8 --------
kernel/sched/psi.c | 4 ++--
2 files changed, 2 insertions(+), 10 deletions(-)
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index ef5b9f6b1d42..46122edd8552 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -2088,17 +2088,13 @@ static int push_dl_task(struct rq *rq)
}
deactivate_task(rq, next_task, 0);
- sub_running_bw(&next_task->dl, &rq->dl);
- sub_rq_bw(&next_task->dl, &rq->dl);
set_task_cpu(next_task, later_rq->cpu);
- add_rq_bw(&next_task->dl, &later_rq->dl);
/*
* Update the later_rq clock here, because the clock is used
* by the cpufreq_update_util() inside __add_running_bw().
*/
update_rq_clock(later_rq);
- add_running_bw(&next_task->dl, &later_rq->dl);
activate_task(later_rq, next_task, ENQUEUE_NOCLOCK);
ret = 1;
@@ -2186,11 +2182,7 @@ static void pull_dl_task(struct rq *this_rq)
resched = true;
deactivate_task(src_rq, p, 0);
- sub_running_bw(&p->dl, &src_rq->dl);
- sub_rq_bw(&p->dl, &src_rq->dl);
set_task_cpu(p, this_cpu);
- add_rq_bw(&p->dl, &this_rq->dl);
- add_running_bw(&p->dl, &this_rq->dl);
activate_task(this_rq, p, 0);
dmin = p->dl.deadline;
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 7acc632c3b82..23fbbcc414d5 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -1051,7 +1051,7 @@ struct psi_trigger *psi_trigger_create(struct psi_group *group,
if (!rcu_access_pointer(group->poll_kworker)) {
struct sched_param param = {
- .sched_priority = MAX_RT_PRIO - 1,
+ .sched_priority = 1,
};
struct kthread_worker *kworker;
@@ -1061,7 +1061,7 @@ struct psi_trigger *psi_trigger_create(struct psi_group *group,
mutex_unlock(&group->trigger_lock);
return ERR_CAST(kworker);
}
- sched_setscheduler(kworker->task, SCHED_FIFO, ¶m);
+ sched_setscheduler_nocheck(kworker->task, SCHED_FIFO, ¶m);
kthread_init_delayed_work(&group->poll_work,
psi_poll_work);
rcu_assign_pointer(group->poll_kworker, kworker);
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