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schedule(): sync CPU_FLAG_NEED_RESCHED flag with clone and migrate

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This commit is contained in:
Balazs Gerofi
2015-09-16 19:22:40 +09:00
parent e7b1115572
commit 40b8587a8a
3 changed files with 40 additions and 12 deletions
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19
kernel/process.c
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@@ -2087,8 +2087,8 @@ static void idle(void)
/* See if we need to migrate a process somewhere */
if (v->flags & CPU_FLAG_NEED_MIGRATE) {
v->flags &= ~CPU_FLAG_NEED_MIGRATE;
do_migrate();
v->flags &= ~CPU_FLAG_NEED_MIGRATE;
}
/*
@@ -2232,8 +2232,8 @@ static void do_migrate(void)
dkprintf("do_migrate(): migrated TID %d from CPU %d to CPU %d\n",
req->proc->ftn->tid, old_cpu_id, cpu_id);
if (v->runq_len == 1)
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(cpu_id)->apic_id, 0xd1);
v->flags |= CPU_FLAG_NEED_RESCHED;
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(cpu_id)->apic_id, 0xd1);
double_rq_unlock(cur_v, v, irqstate);
ack:
@@ -2269,6 +2269,8 @@ redo:
next = NULL;
prev = v->current;
v->flags &= ~CPU_FLAG_NEED_RESCHED;
/* All runnable processes are on the runqueue */
if (prev && prev != &cpu_local_var(idle)) {
@@ -2393,15 +2395,21 @@ release_cpuid(int cpuid)
void check_need_resched(void)
{
unsigned long irqstate;
struct cpu_local_var *v = get_this_cpu_local_var();
irqstate = ihk_mc_spinlock_lock(&v->runq_lock);
if (v->flags & CPU_FLAG_NEED_RESCHED) {
if (v->in_interrupt && (v->flags & CPU_FLAG_NEED_MIGRATE)) {
dkprintf("no migration in IRQ context\n");
kprintf("no migration in IRQ context\n");
ihk_mc_spinlock_unlock(&v->runq_lock, irqstate);
return;
}
v->flags &= ~CPU_FLAG_NEED_RESCHED;
ihk_mc_spinlock_unlock(&v->runq_lock, irqstate);
schedule();
}
else {
ihk_mc_spinlock_unlock(&v->runq_lock, irqstate);
}
}
@@ -2503,6 +2511,7 @@ void __runq_add_proc(struct process *proc, int cpu_id)
struct cpu_local_var *v = get_cpu_local_var(cpu_id);
list_add_tail(&proc->sched_list, &v->runq);
++v->runq_len;
v->flags |= CPU_FLAG_NEED_RESCHED;
proc->cpu_id = cpu_id;
//proc->ftn->status = PS_RUNNING; /* not set here */
get_cpu_local_var(cpu_id)->status = CPU_STATUS_RUNNING;