netdev - Re: ixgbe and mac-vlans problem

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Date:	Thu, 06 May 2010 09:23:10 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	"Tantilov, Emil S" <emil.s.tantilov@...el.com>
CC:	Arnd Bergmann <arnd@...db.de>, NetDev <netdev@...r.kernel.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: ixgbe and mac-vlans problem

On 04/30/2010 03:26 PM, Tantilov, Emil S wrote:
> Ben Greear wrote:
>> On 04/30/2010 02:13 PM, Tantilov, Emil S wrote:

>>> I ran a quick test in my setup with 82599 and was able to pass
>>> traffic on all 50 mac-vlans without issues. This is on net-next.
>>
>> For an 82599 system, I can get 127 mac-vlans working out of 500
>> created.
>>
>> That NIC also does not go PROMISC with lots (500) of mac-vlans.
>>
>> Once I put it in promisc mode manually, it works fine.
>>
>> So, I think whatever logic is supposed to put the NIC into promisc
>> mode when it overflows it's lookup tables isn't working for ixgbe
>> in 2.6.31.12.
>
> Yeah, you're right. I was able to repro it.
>
> We'll look into it.

I'd be happy to test out a patch if you have one available.

If you don't expect to have one soon, please let me know and
I'll add work-arounds to my code to throw ixgbe NICs into PROMISC
mode manually.

Thanks,
Ben

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

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