|Subject:||Re: [Qemu-devel] [RFC] create a single workqueue for each vm to update vm irq routing table|
|Date:||Tue, 26 Nov 2013 16:36:03 +0200|
Il 26/11/2013 14:18, Avi Kivity ha scritto:
>No, this would be exactly the same code that is running now:
>> I don't think a workqueue is even needed. You just need to use call_rcu
>> to free "old" after releasing kvm->irq_lock.
>> What do you think?
> Can this cause an interrupt to be delivered to the wrong (old) vcpu?
old = kvm->irq_routing;
Except that the kfree would run in the call_rcu kernel thread instead of
the vcpu thread. But the vcpus already see the new routing table after
the rcu_assign_pointer that is in kvm_irq_routing_update.
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