Commit 863fbf96 authored Nov 29, 2021 by Zhang Qiao Committed by Yang Yingliang Nov 29, 2021

sched: Unthrottle the throttled cfs rq when offline rq

hulk inclusion
category: feature
bugzilla: 51828, https://gitee.com/openeuler/kernel/issues/I4K96G


CVE: NA

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

In order for the throttled task to continue running
after the CPU is offline, we need unthrottle the
throttled cfs rq saved in the qos_throttled_cfs_rq.

Signed-off-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Zheng Zucheng <zhengzucheng@huawei.com>
Reviewed-by: Chen Hui <judy.chenhui@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

parent 32170886

kernel/sched/fair.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -101,6 +101,8 @@ int __weak arch_asym_cpu_priority(int cpu)

		#ifdef CONFIG_QOS_SCHED
		static DEFINE_PER_CPU_SHARED_ALIGNED(struct list_head, qos_throttled_cfs_rq);

		static int unthrottle_qos_cfs_rqs(int cpu);
		#endif

		#ifdef CONFIG_CFS_BANDWIDTH
		@@ -5131,6 +5133,10 @@ static void __maybe_unused unthrottle_offline_cfs_rqs(struct rq *rq)
		unthrottle_cfs_rq(cfs_rq);
		}
		rcu_read_unlock();

		#ifdef CONFIG_QOS_SCHED
		unthrottle_qos_cfs_rqs(cpu_of(rq));
		#endif
		}

		#else /* CONFIG_CFS_BANDWIDTH */