netdev - Re: Netxen packet loss with VLANs and LRO (was: [PATCH] netxen: fix LRO disable warning)

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Date:	Tue, 5 Apr 2011 12:38:08 +0200
From:	Michał Mirosław <mirqus@...il.com>
To:	Amit Salecha <amit.salecha@...gic.com>
Cc:	Marc Haber <mh+netdev@...schlus.de>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Ameen Rahman <ameen.rahman@...gic.com>,
	Rajesh Borundia <rajesh.borundia@...gic.com>
Subject: Re: Netxen packet loss with VLANs and LRO (was: [PATCH] netxen: fix
 LRO disable warning)

2011/4/5 Amit Salecha <amit.salecha@...gic.com>:
>> 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.
[...]
>> 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.
> If rx csum is disabled, LRO will be disable. LRO won't be enabled automatically if you enable rx csum.
> You need to explicitly enable LRO.

This will change once the driver is converted to hw_features.

Best Regards,
Michał Mirosław
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