This is a note to let you know that I've just added the patch titled
vxlan: vxlan dev should inherit lowerdev's gso_max_size
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vxlan-vxlan-dev-should-inherit-lowerdev-s-gso_max_size.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sun Mar 18 16:55:33 CET 2018
From: Felix Manlunas <felix.manlunas@xxxxxxxxxx>
Date: Wed, 29 Mar 2017 17:56:43 -0700
Subject: vxlan: vxlan dev should inherit lowerdev's gso_max_size
From: Felix Manlunas <felix.manlunas@xxxxxxxxxx>
[ Upstream commit d6acfeb17d030bb3907e77c048b0e7783ad8e5a9 ]
vxlan dev currently ignores lowerdev's gso_max_size, which adversely
affects TSO performance of liquidio if it's the lowerdev. Egress TCP
packets' skb->len often exceed liquidio's advertised gso_max_size. This
may happen on other NIC drivers.
Fix it by assigning lowerdev's gso_max_size to that of vxlan dev. Might as
well do likewise for gso_max_segs.
Single flow TSO throughput of liquidio as lowerdev (using iperf3):
Before the patch: 139 Mbps
After the patch : 8.68 Gbps
Percent increase: 6,144 %
Signed-off-by: Felix Manlunas <felix.manlunas@xxxxxxxxxx>
Signed-off-by: Satanand Burla <satananda.burla@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/vxlan.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2912,6 +2912,11 @@ static int vxlan_dev_configure(struct ne
return -EINVAL;
}
+ if (lowerdev) {
+ dev->gso_max_size = lowerdev->gso_max_size;
+ dev->gso_max_segs = lowerdev->gso_max_segs;
+ }
+
if (conf->mtu) {
err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false);
if (err)
Patches currently in stable-queue which might be from felix.manlunas@xxxxxxxxxx are
queue-4.9/vxlan-vxlan-dev-should-inherit-lowerdev-s-gso_max_size.patch