Messages in this thread | | | Date | Wed, 18 Jul 2007 19:57:29 +0300 | From | Avi Kivity <> | Subject | Re: [kvm-devel] [RFC] Deferred interrupt handling. |
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Alan Cox wrote: >> IMO the only reasonable solution is to disallow interrupt forwarding >> with shared irqs. If someone later comes up with a bright idea, we can >> > > Which means you are back to ISA bus devices. Even checking if an IRQ is > currently unshared isn't simple as with hotplug this may change. > >
Hotplug is user-controllable, so if the user refrains from adding pci devices after assigning a device to the guest, it should work. I think that USB interrupts are assigned to the controller, not the device, so USB hotplug can be ruled out.
I admit this is fairly weak.
>> implement it. Otherwise the problem will solve itself with hardware >> moving to msi. >> > > Only if MSI ever works properly on the bridges and hardware 8( >
Oh, I've no doubt it will be made to work -- there's money to be saved in those irq lines. And msi makes sense technically as well.
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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