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| author | Eric Dumazet <edumazet@google.com> | 2016-11-07 20:12:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-10 00:48:54 +0100 |
| commit | d61d072e87c8ee4938b2517818e7b6498923d6a4 (patch) | |
| tree | 5d14f74159121ee2474fae0f1f22c9438ed94065 /net | |
| parent | Merge branch 'sfc-udp-rss' (diff) | |
| download | linux-d61d072e87c8ee4938b2517818e7b6498923d6a4.tar.xz linux-d61d072e87c8ee4938b2517818e7b6498923d6a4.zip | |
net-gro: avoid reorders
Receiving a GSO packet in dev_gro_receive() is not uncommon
in stacked devices, or devices partially implementing LRO/GRO
like bnx2x. GRO is implementing the aggregation the device
was not able to do itself.
Current code causes reorders, like in following case :
For a given flow where sender sent 3 packets P1,P2,P3,P4
Receiver might receive P1 as a single packet, stored in GRO engine.
Then P2-P4 are received as a single GSO packet, immediately given to
upper stack, while P1 is held in GRO engine.
This patch will make sure P1 is given to upper stack, then P2-P4
immediately after.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/dev.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 0260ad314506..c9837fa08dfc 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4482,7 +4482,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff if (!(skb->dev->features & NETIF_F_GRO)) goto normal; - if (skb_is_gso(skb) || skb_has_frag_list(skb) || skb->csum_bad) + if (skb->csum_bad) goto normal; gro_list_prepare(napi, skb); @@ -4495,7 +4495,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff skb_set_network_header(skb, skb_gro_offset(skb)); skb_reset_mac_len(skb); NAPI_GRO_CB(skb)->same_flow = 0; - NAPI_GRO_CB(skb)->flush = 0; + NAPI_GRO_CB(skb)->flush = skb_is_gso(skb) || skb_has_frag_list(skb); NAPI_GRO_CB(skb)->free = 0; NAPI_GRO_CB(skb)->encap_mark = 0; NAPI_GRO_CB(skb)->recursion_counter = 0; |