[RFC v2] net/af_packet: make stats reset reliable

[Ferruh Yigit]

On 5/2/2024 4:59 PM, Stephen Hemminger wrote:
> On Thu, 2 May 2024 15:22:35 +0100
> Ferruh Yigit <ferruh.yigit at amd.com> wrote:
> 
>>>
>>> It's not going to be completely MT safe, since you can't have two
>>> threads calling the reset function in parallel.
>>>   
>>
>> This is what I meant with "MT-safe reset", so multiple threads not
>> allowed to call stats reset in parallel.
>>
>> And for multiple concurrent counter-updating threads case, suggestion is
>> to stop forwarding.
>>
>> Above two are the update I added to 'rte_eth_stats_reset()' API, and
> 
> I can't see the point of full MT-safe reset. No other driver does it.
> The ethdev control side api's are not MT-safe and making them truly
> MT-safe would add additional ref count and locking.
>

Agree, that is why clarified this in ethdev API:
https:/dpdk.org/patch/139681