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kernel: add missing description for GRO optimization patch 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@44798 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2015-03-16 04:19:09 +00:00
parent 0e879af4ad
commit 0349445009
3 changed files with 42 additions and 0 deletions
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14
target/linux/generic/patches-3.18/680-net-skip-gro-for-otherhost-packets.patch
View File

@ -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
@@ -4003,6 +4003,9 @@ static enum gro_result dev_gro_receive(s

14
target/linux/generic/patches-3.19/680-net-skip-gro-for-otherhost-packets.patch
View File

@ -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

14
target/linux/generic/patches-4.0/680-net-skip-gro-for-otherhost-packets.patch
View File

@ -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
@@ -4005,6 +4005,9 @@ static enum gro_result dev_gro_receive(s