Commit 4b727361 authored Oct 19, 2011 by Eric Dumazet Committed by David S. Miller Oct 21, 2011

virtio_net: fix truesize underestimation



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>

parent e1ac50f6

drivers/net/virtio_net.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;