Netxen packet loss with VLANs and LRO (was: [PATCH] netxen: fix LRO disable warning)
From: Marc Haber <hidden>
Date: 2011-04-03 19:14:21
Hi, On Mon, Mar 21, 2011 at 03:37:08AM -0700, Amit Kumar Salecha wrote:
netxen_nic_set_flags() rejects data if other flag than ETH_FLAG_LRO is set. Driver also supports NETIF_F_HW_VLAN_TX. Now compare data with ethtool_op_get_flags(), to get all supported features.
Could that be the cause for packet loss on kernel 2.6.38.2 if: - receiving card is NX3031 [4040:0100] - frames are received with VLAN tags - large received offload is on. Packet Loss of this kind is noticed when doing TCP data transfers towards the host with the Netxen Interface and the TCP session is terminated on the Netxen host itself. TCP sessions routed through the Netxen host are not affected. My ethtool doesn't allow me to influence the LRO setting alone - it is disabled when I set rx off but doesn't come on again when rx is set to on again. So, ethtool -K rx off, ethtool -K rx on fixes the issue. Is this a known bug, maybe with an available patch? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190