netdev - Re: ixgbe and mac-vlans problem

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Date:	Fri, 30 Apr 2010 11:09:55 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	NetDev <netdev@...r.kernel.org>, Patrick McHardy <kaber@...sh.net>
Subject: Re: ixgbe and mac-vlans problem

On 04/30/2010 11:00 AM, Arnd Bergmann wrote:
> On Friday 30 April 2010 00:27:39 Ben Greear wrote:
>> Basically, we create 50 mac-vlans, with sequential MAC addresses and sequential
>> IP addresses, and set up ip rules properly.
>>
>> The issue is that only 10 or so of the mac-vlans receive other than
>> broadcast packets.  The ixgbe NIC doesn't show PROMISC mode.
>
> I just took a brief look at the driver and noticed that 82599 should
> be able to handle 128 entries before going into promisc mode, while
> 82598 (the same driver) does 16.
>
> Maybe the logic for>16 entries is wrong, so you could try forcing
> hw->mac.num_rar_entries to 16 for 82599 as well.

I think I was actually on an 825998 system when I saw it yesterday,
but I have seen similar issues on 82599, though I didn't take time
to debug it fully, so it could have been something else.

I will double-check the NIC chipset on the system that showed the
problem yesterday.

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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