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virtio_net: fix truesize underestimation

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We must account in skb->truesize, the size of the fragments, not the
used part of them.

Doing this work is important to avoid unexpected OOM situations.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: "Michael S. Tsirkin" <mst@redhat.com>
CC: virtualization@lists.linux-foundation.org
CC: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-10-19 23:14:46 +00:00 committed by David S. Miller
parent e1ac50f646
commit 4b727361f0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/virtio_net.c
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@ -150,6 +150,7 @@ static void set_skb_frag(struct sk_buff *skb, struct page *page,
skb->data_len += size;
skb->len += size;
skb->truesize += PAGE_SIZE;
skb_shinfo(skb)->nr_frags++;
*len -= size;
}
@ -287,7 +288,6 @@ static void receive_buf(struct net_device *dev, void *buf, unsigned int len)
}
hdr = skb_vnet_hdr(skb);
skb->truesize += skb->data_len;
u64_stats_update_begin(&stats->syncp);
stats->rx_bytes += skb->len;