On Thu, 19 Oct 2023 12:16:24 +0200, Jakub Sitnicki <ja...@cloudflare.com> wrote:
> Since commit 19e226e8cc5d ("virtio: Make vp_set_vq_affinity() take a
> mask.") it is actually not needed to have a local copy of the cpu mask.
Could you give more info to prove this?
If you are right, I think you should delete all code about msix_affinity_masks?
Thanks.
>
> Pass the cpu mask we got as argument to set the irq affinity hint.
>
> Cc: Caleb Raitto <carai...@google.com>
> Signed-off-by: Jakub Sitnicki <ja...@cloudflare.com>
> ---
> drivers/virtio/virtio_pci_common.c | 9 +--------
> 1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/drivers/virtio/virtio_pci_common.c
> b/drivers/virtio/virtio_pci_common.c
> index c2524a7207cf..8927bc338f06 100644
> --- a/drivers/virtio/virtio_pci_common.c
> +++ b/drivers/virtio/virtio_pci_common.c
> @@ -433,21 +433,14 @@ int vp_set_vq_affinity(struct virtqueue *vq, const
> struct cpumask *cpu_mask)
> struct virtio_device *vdev = vq->vdev;
> struct virtio_pci_device *vp_dev = to_vp_device(vdev);
> struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
> - struct cpumask *mask;
> unsigned int irq;
>
> if (!vq->callback)
> return -EINVAL;
>
> if (vp_dev->msix_enabled) {
> - mask = vp_dev->msix_affinity_masks[info->msix_vector];
> irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector);
> - if (!cpu_mask)
> - irq_set_affinity_hint(irq, NULL);
> - else {
> - cpumask_copy(mask, cpu_mask);
> - irq_set_affinity_hint(irq, mask);
> - }
> + irq_set_affinity_hint(irq, cpu_mask);
> }
> return 0;
> }
> --
> 2.41.0
>
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