Commit 9a5bde9c authored by Guan Jing's avatar Guan Jing Committed by Tiancheng Lu
Browse files

sched/fair: Add cmdline nosmtexpell 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6SIY2



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

Add cmdline nosmtexpell to disable qos_smt_expell when we want to close.

Signed-off-by: default avatarGuan Jing <guanjing6@huawei.com>
parent e4108f66

kernel/sched/fair.c

+27 −1
Original line number Diff line number Diff line
@@ -7781,6 +7781,15 @@ static bool qos_smt_expelled(int this_cpu) 
#endif



#ifdef CONFIG_QOS_SCHED_SMT_EXPELLER

DEFINE_STATIC_KEY_TRUE(qos_smt_expell_switch);



static int __init qos_sched_smt_noexpell_setup(char *__unused)

{

	static_branch_disable(&qos_smt_expell_switch);

	return 1;

}

__setup("nosmtexpell", qos_sched_smt_noexpell_setup);



static bool qos_smt_check_siblings_status(int this_cpu)

{

	int cpu;
@@ -7809,6 +7818,9 @@ static bool qos_sched_idle_cpu(int this_cpu) 


static bool qos_smt_expelled(int this_cpu)

{

	if (!static_branch_likely(&qos_smt_expell_switch))

		return false;



	/*

	 * The qos_smt_status of siblings cpu is online, and current cpu only has

	 * offline tasks enqueued, there is not suitable task,
@@ -7865,15 +7877,29 @@ static void qos_smt_send_ipi(int this_cpu) 


static void qos_smt_expel(int this_cpu, struct task_struct *p)

{

	if (!static_branch_likely(&qos_smt_expell_switch))

		return;



	if (qos_smt_update_status(p))

		qos_smt_send_ipi(this_cpu);

}



static inline bool qos_smt_enabled(void)

{

	if (!static_branch_likely(&qos_smt_expell_switch))

		return false;



	if (!sched_smt_active())

		return false;



	return true;

}



static bool _qos_smt_check_need_resched(int this_cpu, struct rq *rq)

{

	int cpu;



	if (!sched_smt_active())

	if (!qos_smt_enabled())

		return false;



	for_each_cpu(cpu, cpu_smt_mask(this_cpu)) {