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| author | Felix Fietkau <nbd@openwrt.org> | 2015-03-16 04:19:09 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2015-03-16 04:19:09 +0000 |
| commit | d5b99a2d741447d5fe4c89013d607d52c699273b (patch) | |
| tree | 42ee0330b42943885d63b7905ef748e8b5654f45 /target/linux/generic/patches-3.19 | |
| parent | 270bc6427b89c996ec7eb657dc66f20e4a3b297b (diff) | |
| download | upstream-d5b99a2d741447d5fe4c89013d607d52c699273b.tar.gz upstream-d5b99a2d741447d5fe4c89013d607d52c699273b.tar.bz2 upstream-d5b99a2d741447d5fe4c89013d607d52c699273b.zip | |
kernel: add missing description for GRO optimization patch
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 44798
Diffstat (limited to 'target/linux/generic/patches-3.19')
| -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 |