Re: [PATCH net-next 9/9] ldmvsw: disable tso and gso for bridge operations

On 2/3/2017 9:59 AM, Eric Dumazet wrote:

On Fri, 2017-02-03 at 09:42 -0800, Shannon Nelson wrote:

quoted

The ldmvsw driver is specifically for supporting the ldom virtual
networking by running in the primary ldom and using the LDC to connect
the remaining ldoms to the outside world via a bridge.  With TSO and GSO
supported while connected the bridge, things tend to misbehave as seen in
our case by delayed packets, enough to begin triggering retransmits and
affecting overall throughput.  By turning off advertised support for TSO
and GSO we restore stable traffic flow through the bridge.

Orabug: 23293104

Signed-off-by: Shannon Nelson <redacted>
---
 drivers/net/ethernet/sun/ldmvsw.c         |    5 ++---
 drivers/net/ethernet/sun/sunvnet_common.c |    3 ++-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c
index 552c0a9..bd2cfbc 100644
--- a/drivers/net/ethernet/sun/ldmvsw.c
+++ b/drivers/net/ethernet/sun/ldmvsw.c

@@ -299,8 +299,7 @@ static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
 	dev->ethtool_ops = &vsw_ethtool_ops;
 	dev->watchdog_timeo = VSW_TX_TIMEOUT;

-	dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
-			   NETIF_F_HW_CSUM | NETIF_F_SG;
+	dev->hw_features = NETIF_F_HW_CSUM;

You also removed NETIF_F_SG

Hmmm - yep, I'll put that back in for the respin.

Thanks,
sln