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add new cpu state CPU_STATUS_RESERVED

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This commit is contained in:
Tomoki Shirasawa
2015-02-18 13:46:08 +09:00
parent bb137bc9bb
commit c0edb6fe6f
5 changed files with 21 additions and 16 deletions
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31
kernel/process.c
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@@ -1996,7 +1996,8 @@ static void idle(void)
{
struct cpu_local_var *v = get_this_cpu_local_var();
v->status = CPU_STATUS_IDLE;
if(v->status == CPU_STATUS_RUNNING)
v->status = CPU_STATUS_IDLE;
cpu_enable_interrupt();
while (1) {
@@ -2021,7 +2022,8 @@ static void idle(void)
* 4) The idle process was resumed, and halted for waiting for
* the interrupt that had already been handled.
*/
if (v->status == CPU_STATUS_IDLE) {
if (v->status == CPU_STATUS_IDLE ||
v->status == CPU_STATUS_RESERVED) {
long s;
struct process *p;
@@ -2034,7 +2036,8 @@ static void idle(void)
}
ihk_mc_spinlock_unlock(&v->runq_lock, s);
}
if (v->status == CPU_STATUS_IDLE) {
if (v->status == CPU_STATUS_IDLE ||
v->status == CPU_STATUS_RESERVED) {
cpu_safe_halt();
}
else {
@@ -2189,19 +2192,8 @@ redo:
/* No process? Run idle.. */
if (!next) {
list_for_each_entry_safe(proc, tmp, &(v->runq), sched_list) {
if (proc->ftn->status & (PS_INTERRUPTIBLE |
PS_UNINTERRUPTIBLE |
PS_STOPPED |
PS_TRACED)) {
next = proc;
break;
}
}
if (!next) {
next = &cpu_local_var(idle);
v->status = CPU_STATUS_IDLE;
}
next = &cpu_local_var(idle);
v->status = v->runq_len? CPU_STATUS_RESERVED: CPU_STATUS_IDLE;
}
}
@@ -2258,6 +2250,13 @@ redo:
}
}
void
release_cpuid(int cpuid)
{
if (!get_cpu_local_var(cpuid)->runq_len)
get_cpu_local_var(cpuid)->status = CPU_STATUS_IDLE;
}
void check_need_resched(void)
{
struct cpu_local_var *v = get_this_cpu_local_var();