netdev - Re: Trying to implement secondary loopback

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Message-ID: <CAFLxGvyzkoj_KtfH6=YK5LnpLW_N6sMdk7Hu=V=h5OK08oRE4Q@mail.gmail.com>
Date:	Fri, 15 Mar 2013 15:45:45 +0100
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Thomas Martitz <thomas.martitz@....fraunhofer.de>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"edumazet@...gle.com" <edumazet@...gle.com>,
	"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>
Subject: Re: Trying to implement secondary loopback

On Fri, Mar 15, 2013 at 3:35 PM, Thomas Martitz
<thomas.martitz@....fraunhofer.de> wrote:
> Am 15.03.2013 15:32, schrieb richard -rw- weinberger:
>
>> On Fri, Mar 15, 2013 at 3:20 PM, Thomas Martitz
>> <thomas.martitz@....fraunhofer.de> wrote:
>>>>
>>>> The real question is, why do you need a second one?
>>>> I assume your driver (for the non-existing hardware) is a ethernet
>>>> driver,
>>>> and now you're looking for a way to test your shiny new ethX device,
>>>> correct?
>>>>
>>>
>>> Yes. But that's only the first step. Once I have the basic ethX device
>>> working I want to make sure the PCIe data transfer is working (with good
>>> performance), ideally using the very same test application in user space.
>>
>>
>> And there is the second loopback device is this picture?
>>
>
> Mine is the second one, as I cannot modify "lo". The standard "lo" interface
> is the the first loopback and it seems to be hardcoded to be the only one.

And why can't you implement a regular ethernet driver like everyone else does?

-- 
Thanks,
//richard
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