Re: [PATCH 1/2] virtio: support unlocked queue poll

[Rusty Russell]

"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes:
> This adds a way to check ring empty state after enable_cb outside any
> locks. Will be used by virtio_net.
>
> Note: there's room for more optimization: caller is likely to have a
> memory barrier already, which means we might be able to get rid of a
> barrier here.  Deferring this optimization until we do some
> benchmarking.
>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

Thanks,
Rusty.
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