diff options
Diffstat (limited to 'target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch')
| -rw-r--r-- | target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch b/target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch index e3fa9172e2..292d02174a 100644 --- a/target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch +++ b/target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch @@ -1,3 +1,17 @@ +Subject: NET: skip GRO for otherhost packets + +For network drivers using napi_gro_receive, packets are run through GRO, +even when the destination MAC address does not match, and they're supposed +to be delivered to another host behind a different bridge port. + +This can be very expensive, because for drivers without TSO or scatter- +gather, this can only be undone by copying the skb and checksumming it +again. + +Fix this by leaving skbs with PACKET_OTHERHOST untouched. + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> + --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3967,6 +3967,9 @@ static enum gro_result dev_gro_receive(s |