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hv: schedule: remove runqueue_lock in sched_context

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Now sched_object and sched_context are protected by scheduler_lock. There's no
chance to use runqueue_lock to protect schedule runqueue if we have no plan to
support schedule migration.

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
This commit is contained in:
Li, Fei1
2019-07-09 00:17:51 +08:00
committed by ACRN System Integration
parent b1dd3e26f5
commit e69b3dcf67
3 changed files with 5 additions and 15 deletions
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11
hypervisor/common/schedule.c
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@@ -24,7 +24,6 @@ void init_scheduler(void)
for (i = 0U; i < pcpu_nums; i++) {
ctx = &per_cpu(sched_ctx, i);
spinlock_init(&ctx->runqueue_lock);
spinlock_init(&ctx->scheduler_lock);
INIT_LIST_HEAD(&ctx->runqueue);
ctx->flags = 0UL;
@@ -74,33 +73,25 @@ void add_to_cpu_runqueue(struct sched_object *obj, uint16_t pcpu_id)
{
struct sched_context *ctx = &per_cpu(sched_ctx, pcpu_id);
spinlock_obtain(&ctx->runqueue_lock);
if (list_empty(&obj->run_list)) {
list_add_tail(&obj->run_list, &ctx->runqueue);
}
spinlock_release(&ctx->runqueue_lock);
}
void remove_from_cpu_runqueue(struct sched_object *obj, uint16_t pcpu_id)
void remove_from_cpu_runqueue(struct sched_object *obj)
{
struct sched_context *ctx = &per_cpu(sched_ctx, pcpu_id);
spinlock_obtain(&ctx->runqueue_lock);
list_del_init(&obj->run_list);
spinlock_release(&ctx->runqueue_lock);
}
static struct sched_object *get_next_sched_obj(struct sched_context *ctx)
{
struct sched_object *obj = NULL;
spinlock_obtain(&ctx->runqueue_lock);
if (!list_empty(&ctx->runqueue)) {
obj = get_first_item(&ctx->runqueue, struct sched_object, run_list);
} else {
obj = &get_cpu_var(idle);
}
spinlock_release(&ctx->runqueue_lock);
return obj;
}