Re: [RFC][PATCH v2 00/11] uq/master: irqfd-based interrupt injection for virtio/vhost

[Avi Kivity <avi@redhat.com>]

On 05/17/2012 04:32 PM, Jan Kiszka wrote:
> [ changes in v2: rebase over uq/master ]
>
> This series is another major milestone of merging qemu-kvm into
> upstream. It implements the required interfaces and logic to directly
> inject MSI-X interrupts generated by the vhost-net kernel module into
> the KVM in-kernel irqchip. This involves
>  - establishing MSI vector notifiers, so far triggered on relevant MSI-X
>    configuration changes of subscribed PCI devices
>  - support for static vIRQ-to-MSI routes
>  - an API for linking an IRQFD with such a vIRQ
>  - the usage of these services in virtio-pci to enable direct injection
>
> The series also contains some smaller refactorings of the KVM IRQ
> routing API such as automatic committing of route changes. It applies on
> top of the KVM MSI support series [1] posted recently. The complete
> stack is available at
>
>     git://git.kiszka.org/qemu-kvm.git queues/kvm-msi-irqfd
>
> If the proposes API is acceptable, I will also provide some morphing
> patches for qemu-kvm to make the merge of both trees smoother.
>
> After this series, to only reasons to still use qemu-kvm for production
> purposes will be PCI device assignment and potential dependencies on
> legacy command line switches as well as vmstate formats (when requiring
> backward migration support). However, the majority of users should be
> able to switch to upstream QEMU seamlessly and finally receive the same
> level of performance on x86.
>
>

Thanks, applied.

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