Re: [PATCH net-next 2/2] tuntap: free XDP dropped packets in a batch

[David Miller]

From: Jason Wang <jasowang@xxxxxxxxxx>
Date: Thu, 15 Nov 2018 17:43:10 +0800

> Thanks to the batched XDP buffs through msg_control. Instead of
> calling put_page() for each page which involves a atomic operation,
> let's batch them by record the last page that needs to be freed and
> its refcnt count and free them in a batch.
> 
> Testpmd(virtio-user + vhost_net) + XDP_DROP shows 3.8% improvement.
> 
> Before: 4.71Mpps
> After : 4.89Mpps
> 
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>

Applied.