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sched/core: Remove HK_TYPE_SCHED

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The HK_TYPE_SCHED housekeeping type is defined but not set anywhere. So
any code that try to use HK_TYPE_SCHED are essentially dead code. So
remove HK_TYPE_SCHED and any code that use it.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20241030175253.125248-2-longman@redhat.com
This commit is contained in:
Waiman Long 2024-10-30 13:52:50 -04:00 committed by Peter Zijlstra
parent a76328d44c
commit ae5c677729
3 changed files with 0 additions and 16 deletions
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1
include/linux/sched/isolation.h
View File

@ -10,7 +10,6 @@ enum hk_type {
HK_TYPE_TIMER,
HK_TYPE_RCU,
HK_TYPE_MISC,
HK_TYPE_SCHED,
HK_TYPE_TICK,
HK_TYPE_DOMAIN,
HK_TYPE_WQ,

14
kernel/sched/fair.c
View File

@ -12197,9 +12197,6 @@ static inline int on_null_domain(struct rq *rq)
* - When one of the busy CPUs notices that there may be an idle rebalancing
* needed, they will kick the idle load balancer, which then does idle
* load balancing for all the idle CPUs.
*
* - HK_TYPE_MISC CPUs are used for this task, because HK_TYPE_SCHED is not set
* anywhere yet.
*/
static inline int find_new_ilb(void)
{
@ -12444,10 +12441,6 @@ void nohz_balance_enter_idle(int cpu)
if (!cpu_active(cpu))
return;
/* Spare idle load balancing on CPUs that don't want to be disturbed: */
if (!housekeeping_cpu(cpu, HK_TYPE_SCHED))
return;
/*
* Can be set safely without rq->lock held
* If a clear happens, it will have evaluated last additions because
@ -12667,13 +12660,6 @@ static void nohz_newidle_balance(struct rq *this_rq)
{
int this_cpu = this_rq->cpu;
/*
* This CPU doesn't want to be disturbed by scheduler
* housekeeping
*/
if (!housekeeping_cpu(this_cpu, HK_TYPE_SCHED))
return;
/* Will wake up very soon. No time for doing anything else*/
if (this_rq->avg_idle < sysctl_sched_migration_cost)
return;

1
kernel/sched/isolation.c
View File

@ -12,7 +12,6 @@ enum hk_flags {
HK_FLAG_TIMER = BIT(HK_TYPE_TIMER),
HK_FLAG_RCU = BIT(HK_TYPE_RCU),
HK_FLAG_MISC = BIT(HK_TYPE_MISC),
HK_FLAG_SCHED = BIT(HK_TYPE_SCHED),
HK_FLAG_TICK = BIT(HK_TYPE_TICK),
HK_FLAG_DOMAIN = BIT(HK_TYPE_DOMAIN),
HK_FLAG_WQ = BIT(HK_TYPE_WQ),