netdev - Re: [PATCH RFC net-next] virtio_net: Relax queue requirement for using XDP

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Message-ID: <cf132d5f-5359-b3a5-38c2-34583aae3f36@redhat.com>
Date:   Wed, 26 Feb 2020 11:52:36 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     David Ahern <dahern@...italocean.com>,
        David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        "Michael S . Tsirkin" <mst@...hat.com>
Subject: Re: [PATCH RFC net-next] virtio_net: Relax queue requirement for
 using XDP


On 2020/2/26 上午11:34, David Ahern wrote:
> On 2/25/20 8:29 PM, Jason Wang wrote:
>> TAP uses spinlock for XDP_TX.
> code reference? I can not find that.
>

In tun_xdp_xmit(), ptr_ring is synchronized through producer_lock.

Thanks