On 08/26/2009 08:45 PM, Davide Libenzi wrote:
OK, if I get it correctly, there is one eventfd signaler (the device), and one eventfd reader (the hypervisor), right? Each hypervisor listens for multiple devices detecting state changes, and associating the eventfd "line" to the IRQ number by some configuration (ala PCI), right?
Yes. The PCI stuff happens in userspace, all the hypervisor sees is "this eventfd is IRQ 10". There may be multiple eventfds routed to one IRQ (corresponding to a shared IRQ line).
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