Hi Thomas,
Currently irq_set_affinity() is called to migrate irqs from
migrate_one_irq()
during cpu hot plug and clients which are interested to know the irq
affinity change
not getting notified
take_cpu_down () --> __cpu_disable() --> irq_migrate_all_off_this_cpu();
irq_set_affinity() is changing the IRQ affinity at chip level
but it is not notifying the affinity_notify work.
How about below change, so that clients drivers gets notified about irq
affinity changes?
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -207,6 +207,7 @@ int irq_do_set_affinity(struct irq_data *data, const
struct cpumask *mask,
case IRQ_SET_MASK_OK_DONE:
cpumask_copy(desc->irq_common_data.affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
+ schedule_work(&desc->affinity_notify->work);
irq_set_thread_affinity(desc);
ret = 0;
With this change, notifications of IRQ affinity gets executed and
notified
to client drivers.
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