netdev - [PATCH v5 20/22] virtio_net: set the default max ring num

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Message-Id: <20220214081416.117695-21-xuanzhuo@linux.alibaba.com>
Date:   Mon, 14 Feb 2022 16:14:14 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>, bpf@...r.kernel.org
Subject: [PATCH v5 20/22] virtio_net: set the default max ring num

Sets the default maximum ring num based on virtio_set_max_ring_num().

The default maximum ring num is 1024.

Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
---
 drivers/net/virtio_net.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index a4ffd7cdf623..77e61fe0b2ce 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -35,6 +35,8 @@ module_param(napi_tx, bool, 0644);
 #define GOOD_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
 #define GOOD_COPY_LEN	128
 
+#define VIRTNET_DEFAULT_MAX_RING_NUM 1024
+
 #define VIRTNET_RX_PAD (NET_IP_ALIGN + NET_SKB_PAD)
 
 /* Amount of XDP headroom to prepend to packets for use by xdp_adjust_head */
@@ -3045,6 +3047,8 @@ static int virtnet_find_vqs(struct virtnet_info *vi)
 			ctx[rxq2vq(i)] = true;
 	}
 
+	virtio_set_max_ring_num(vi->vdev, VIRTNET_DEFAULT_MAX_RING_NUM);
+
 	ret = virtio_find_vqs_ctx(vi->vdev, total_vqs, vqs, callbacks,
 				  names, ctx, NULL);
 	if (ret)
-- 
2.31.0