Re: [PATCH net-next v5 13/14] libie: add per-queue Page Pool stats

[Alexander Lobakin]

From: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Wed, 29 Nov 2023 06:29:14 -0800

> On Wed, 29 Nov 2023 14:40:33 +0100 Alexander Lobakin wrote:
>>> Expand the libie generic per-queue stats with the generic Page Pool
>>> stats provided by the API itself, when CONFIG_PAGE_POOL_STATS is
>>> enabled. When it's not, there'll be no such fields in the stats
>>> structure, so no space wasted.  
>>
>> Do I get it correctly that after Page Pool Netlink introspection was
>> merged, this commit makes no sense and we shouln't add PP stats to the
>> drivers private ones?
> 
> Yes, 100%.

Meh, this way the stats won't survive ifdown/ifup cycles as usually
page_pools get destroyed on ifdown :z
In that patch, I backup the PP stats to a device-lifetime container when
the pool gets destroyed, maybe we could do something similar?

> 
> FWIW I am aware that better tooling would be good so non-developers
> could access to the PP Netlink :(  I'm thinking we should clean up 
> YNL lib packaging a little and try to convince iproute2 maintainers 
> to accept simple CLI built on top of it.

Thanks,
Olek