Re: [PATCH 2/5] virtio: introduce an API to set affinity for a virtqueue

[Rusty Russell]

Paolo Bonzini <pbonzini@xxxxxxxxxx> writes:

> From: Jason Wang <jasowang@xxxxxxxxxx>
>
> Sometimes, virtio device need to configure irq affinity hint to maximize the
> performance. Instead of just exposing the irq of a virtqueue, this patch
> introduce an API to set the affinity for a virtqueue.
>
> The api is best-effort, the affinity hint may not be set as expected due to
> platform support, irq sharing or irq type. Currently, only pci method were
> implemented and we set the affinity according to:
>
> - if device uses INTX, we just ignore the request
> - if device has per vq vector, we force the affinity hint
> - if the virtqueues share MSI, make the affinity OR over all affinities
>   requested
>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

Applied, thanks.

Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

Cheers,
Rusty.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/