Commit 955dfda0 authored by zhangwei123171's avatar zhangwei123171
Browse files

sched/fair: Modify idle cpu judgment in dynamic affinity 

jingdong inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8F9FB



-----------------------------------------------------

In a co-location scenario, when an online container uses
the dynamic affinity capability, the CPU that is full of
offline tasks will also be used as an idle CPU,
which is more friendly to online tasks.

Fixes: 2a3bb3c0 ("sched: Adjust wakeup cpu range according CPU util dynamicly")
Signed-off-by: default avatarzhangwei123171 <zhangwei123171@jd.com>
Reviewed-by: default avatarzhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>
parent c4c07841

kernel/sched/fair.c

+2 −2
Original line number Diff line number Diff line
@@ -7354,7 +7354,7 @@ static void set_task_select_cpus(struct task_struct *p, int *idlest_cpu, 
	rcu_read_lock();

	tg = task_group(p);

	for_each_cpu(cpu, p->prefer_cpus) {

		if (idlest_cpu && available_idle_cpu(cpu)) {

		if (idlest_cpu && (available_idle_cpu(cpu) || sched_idle_cpu(cpu))) {

			*idlest_cpu = cpu;

		} else if (idlest_cpu) {

			spare = (long)(capacity_of(cpu) -
@@ -7365,7 +7365,7 @@ static void set_task_select_cpus(struct task_struct *p, int *idlest_cpu, 
			}

		}



		if (available_idle_cpu(cpu)) {

		if (available_idle_cpu(cpu) || sched_idle_cpu(cpu)) {

			rcu_read_unlock();

			p->select_cpus = p->prefer_cpus;

			if (sd_flag & SD_BALANCE_WAKE)