netdev - Re: [PATCH net-next v3 00/13] net: page_pool: add netlink-based introspection

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Date: Sun, 26 Nov 2023 14:43:00 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Shakeel Butt <shakeelb@...gle.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, almasrymina@...gle.com, hawk@...nel.org,
 ilias.apalodimas@...aro.org, dsahern@...il.com, dtatulea@...dia.com,
 willemb@...gle.com
Subject: Re: [PATCH net-next v3 00/13] net: page_pool: add netlink-based
 introspection

On Sat, 25 Nov 2023 20:57:24 +0000 Shakeel Butt wrote:
> > $ ./page-pool
> >     eth0[2]	page pools: 10 (zombies: 0)
> > 		refs: 41984 bytes: 171966464 (refs: 0 bytes: 0)
> > 		recycling: 90.3% (alloc: 656:397681 recycle: 89652:270201)  
> 
> Hi Jakub, I am wondering if you considered to expose these metrics
> through meminfo/vmstat as well, is that a bad idea or is this/netlink
> more of a preference?

If that's net-namespaced we can add the basics there. We'll still need
the netlink interface, tho, it's currently per-interface and per-queue
(simplifying a bit). But internally the recycling stats are also
per-CPU, which could be of interest at some stage.