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authorJason Wang <jasowang@redhat.com>2016-12-23 22:37:29 +0800
committerDavid S. Miller <davem@davemloft.net>2016-12-23 13:48:55 -0500
commit5c33474d41af09f09c98f1df70f267920587bec0 (patch)
treec51daeff71e8a8f1851fd255dc8bb856ee6ac1fd
parentb00f70b0dacb3d2e009afce860ebc90219072f5c (diff)
downloadlinux-5c33474d41af09f09c98f1df70f267920587bec0.tar.bz2
virtio-net: make rx buf size estimation works for XDP
We don't update ewma rx buf size in the case of XDP. This will lead underestimation of rx buf size which causes host to produce more than one buffers. This will greatly increase the possibility of XDP page linearization. Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/virtio_net.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0778dc88597e..77ae358ec630 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -584,10 +584,12 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
put_page(page);
head_skb = page_to_skb(vi, rq, xdp_page,
0, len, PAGE_SIZE);
+ ewma_pkt_len_add(&rq->mrg_avg_pkt_len, len);
return head_skb;
}
break;
case XDP_TX:
+ ewma_pkt_len_add(&rq->mrg_avg_pkt_len, len);
if (unlikely(xdp_page != page))
goto err_xdp;
rcu_read_unlock();
@@ -596,6 +598,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
default:
if (unlikely(xdp_page != page))
__free_pages(xdp_page, 0);
+ ewma_pkt_len_add(&rq->mrg_avg_pkt_len, len);
goto err_xdp;
}
}