Re: [dpdk-dev] [PATCH v2 3/3] net/af_packet: get 'framesz' from the iface's MTU

["Lam, Tiago" <tiago.lam@intel.com>]

Hi Ferruh,

On 28/11/2018 13:33, Ferruh Yigit wrote:
> On 11/28/2018 1:12 PM, Lam, Tiago wrote:
>> On 27/11/2018 17:43, Ferruh Yigit wrote:
>>> On 11/20/2018 10:26 AM, Tiago Lam wrote:
>>>> Use the underlying MTU to calculate the framsize to be used for the mmap
>>>> RINGs. This is to make it more flexible on deployments with different
>>>> MTU requirements, instead of using a pre-defined value of 2048B.
>>>
>>> This behavior change should be documented in af_packet documentation which is
>>> missing unfortunately.
>>> Would you able to introduce the initial/basic af_packet doc to at least to
>>> document device argument? If not please let me know, I can work on it.
>>>
>>
>> Thanks for the review, Ferruh.
>>
>> Yeah, I don't mind cooking something up and submitting here for review;
>> I'll wait a couple of days for a reply from John W. before proceeding,
>> though.
> 
> Thanks, appreciated. Agreed to wait a little.
> 
>>
>> But given there's no documentation for af_packet yet, do you prefer to
>> wait for that to be available, and apply it all together? Or could that
>> be applied later as part of another patch?
> 
> Both are OK, depends on your availability.
> 
> I think it is better, to show the history, first patch as the documentation
> patch for existing behavior and your patch updating framsz usage (3/3) to update
> that document as well.

As agreed, I just sent a patch with an initial take on adding some docs
for af_packet. Once that's in I'll submit another revision of this
patchset, including an update to the documentation.

Just an aside, patch 1/3 of this series is a bugfix, it could go in
irrespective of the documentation, it seems.

Tiago.