static int __cpuinit comp_pool_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
struct ehca_cpu_comp_task *cct;
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu);
if (!create_comp_task(pool, cpu)) {
ehca_gen_err("Can't create comp_task for cpu: %x", cpu);
return NOTIFY_BAD;
}
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu);
cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
kthread_bind(cct->task, any_online_cpu(cpu_online_map));
destroy_comp_task(pool, cpu);
break;
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_ONLINE)", cpu);
cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
kthread_bind(cct->task, cpu);
wake_up_process(cct->task);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DOWN_PREPARE)", cpu);
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DOWN_FAILED)", cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
ehca_gen_dbg("CPU: %x (CPU_DEAD)", cpu);
destroy_comp_task(pool, cpu);
take_over_work(pool, cpu);
break;
}
return NOTIFY_OK;
}
void ehca_destroy_comp_pool(void)
{
int i;
if (!ehca_scaling_code)
return;
unregister_hotcpu_notifier(&comp_pool_callback_nb);
for_each_online_cpu(i)
destroy_comp_task(pool, i);
free_percpu(pool->cpu_comp_tasks);
kfree(pool);
}
void ehca_destroy_comp_pool(void)
{
int i;
if (!ehca_scaling_code)
return;
unregister_hotcpu_notifier(&comp_pool_callback_nb);
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
destroy_comp_task(pool, i);
}
free_percpu(pool->cpu_comp_tasks);
kfree(pool);
}
void ehca_destroy_comp_pool(void)
{
int i;
if (!ehca_scaling_code)
return;
#ifdef CONFIG_HOTPLUG_CPU
unregister_cpu_notifier(&comp_pool_callback_nb);
#endif
for (i = 0; i < NR_CPUS; i++) {
if (cpu_online(i))
destroy_comp_task(pool, i);
}
free_percpu(pool->cpu_comp_tasks);
kfree(pool);
}