linux-kernel - Re: [PATCH net V2] virtio-net: re enable XDP

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Date:   Mon, 5 Mar 2018 10:43:41 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     David Miller <davem@...emloft.net>
Cc:     mst@...hat.com, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        brouer@...hat.com, john.fastabend@...il.com
Subject: Re: [PATCH net V2] virtio-net: re enable XDP_REDIRECT for mergeable
 buffer



On 2018年03月05日 07:38, David Miller wrote:
> From: Jason Wang <jasowang@...hat.com>
> Date: Fri,  2 Mar 2018 17:29:14 +0800
>
>> XDP_REDIRECT support for mergeable buffer was removed since commit
>> 7324f5399b06 ("virtio_net: disable XDP_REDIRECT in receive_mergeable()
>> case"). This is because we don't reserve enough tailroom for struct
>> skb_shared_info which breaks XDP assumption. So this patch fixes this
>> by reserving enough tailroom and using fixed size of rx buffer.
>>
>> Signed-off-by: Jason Wang <jasowang@...hat.com>
>> ---
>> Changes from V1:
>> - do not add duplicated tracepoint when redirection fails
> Applied to net-next, thanks Jason.

Hi David,

Consider the change is not large, any chance to make it for -net to keep 
XDP redirection work?

Thanks