Re: [PATCH v2] vhost: don't set vring call if guest notifiers is not enabled

[Jason Wang]

On Mon, Apr 8, 2024 at 3:33 PM lyx634449800 <yuxue.liu@jaguarmicro.com> wrote:
>
> When conducting performance testing using testpmd in the guest os,
> it was observed that the performance was lower compared to the
> scenario of direct vfio-pci usage.
>
> In the commit 96a3d98d2cdbd897ff5ab33427aa4cfb94077665, the author
> provided a good solution. However, because the guest OS's
> driver(e.g., virtio-net pmd) may not enable the msix capability, the
> function k->query_guest_notifiers(qbus->parent) may return false,
> resulting in the expected effect not being achieved. To address this
> issue, modify the conditional statement.
>
> Signed-off-by: Yuxue Liu <yuxue.liu@jaguarmicro.com>

Acked-by: Jason Wang <jasowang@redhat.com>

Thanks