netdev - Re: [PATCH net-next v2 0/3] net: core: Unify dstats with tstats and lstats, add generic collection helper

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Date: Wed, 5 Jun 2024 19:18:00 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jeremy Kerr <jk@...econstruct.com.au>
Cc: David Ahern <dsahern@...nel.org>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 0/3] net: core: Unify dstats with tstats and
 lstats, add generic collection helper

On Thu, 06 Jun 2024 10:11:51 +0800 Jeremy Kerr wrote:
> If we're not exporting the helpers, that means that drivers that use
> dstats wouldn't have a facility to customise the stats collection
> through a ndo_get_stats64() callback though (as can be done with
> tstats). Are you ok with that?
> 
> [the set of drivers that need that is currently zero, so more of a
> hypothetical future problem...]

Right, but I think "no exports unless there is an in-tree user"
is still a rule. A bit of a risk that someone will roll their own
per-cpu stats pointlessly if we lack this export. But let's try
to catch that in review..