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Merge "sched: Improve the scheduler"

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This commit is contained in:
qctecmdr
2022-04-21 05:50:45 -07:00
committed by Gerrit - the friendly Code Review server
parent 1c8ec7dfb4 6b9b3223e4
commit 328a356f84
2 changed files with 21 additions and 2 deletions
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6
kernel/sched/core.c
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@@ -3817,8 +3817,12 @@ void scheduler_tick(void)
if (curr->sched_class == &fair_sched_class)
check_for_migration(rq, curr);
if (idle_cpu(cpu) && is_reserved(cpu))
#ifdef CONFIG_SMP
rq_lock(rq, &rf);
if (idle_cpu(cpu) && is_reserved(cpu) && !rq->active_balance)
clear_reserved(cpu);
rq_unlock(rq, &rf);
#endif
}

17
kernel/sched/fair.c
View File

@@ -12838,12 +12838,23 @@ static void walt_rotate_work_func(struct work_struct *work)
{
struct walt_rotate_work *wr = container_of(work,
struct walt_rotate_work, w);
struct rq *src_rq = cpu_rq(wr->src_cpu), *dst_rq = cpu_rq(wr->dst_cpu);
unsigned long flags;
migrate_swap(wr->src_task, wr->dst_task, wr->dst_cpu, wr->src_cpu);
put_task_struct(wr->src_task);
put_task_struct(wr->dst_task);
local_irq_save(flags);
double_rq_lock(src_rq, dst_rq);
dst_rq->active_balance = 0;
src_rq->active_balance = 0;
double_rq_unlock(src_rq, dst_rq);
local_irq_restore(flags);
clear_reserved(wr->src_cpu);
clear_reserved(wr->dst_cpu);
}
@@ -12930,7 +12941,8 @@ static void walt_check_for_rotation(struct rq *src_rq)
dst_rq = cpu_rq(dst_cpu);
double_rq_lock(src_rq, dst_rq);
if (dst_rq->curr->sched_class == &fair_sched_class) {
if (dst_rq->curr->sched_class == &fair_sched_class &&
!src_rq->active_balance && !dst_rq->active_balance) {
get_task_struct(src_rq->curr);
get_task_struct(dst_rq->curr);
@@ -12943,7 +12955,10 @@ static void walt_check_for_rotation(struct rq *src_rq)
wr->src_cpu = src_cpu;
wr->dst_cpu = dst_cpu;
dst_rq->active_balance = 1;
src_rq->active_balance = 1;
}
double_rq_unlock(src_rq, dst_rq);
if (wr)