netdev - Re: [PATCH net-next] net: page_pool: add pages and released

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Date:   Mon, 17 Apr 2023 16:36:03 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     netdev@...r.kernel.org, hawk@...nel.org,
        ilias.apalodimas@...aro.org, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com,
        lorenzo.bianconi@...hat.com, jdamato@...tly.com
Subject: Re: [PATCH net-next] net: page_pool: add pages and released_pages
 counters

On Mon, 17 Apr 2023 23:39:40 +0200 Lorenzo Bianconi wrote:
> > Yup, that sounds better.  
> 
> ack, fine. I am now wondering if these counters are useful just during
> debugging or even in the normal use-case.

I was wondering about it too, FWIW, I think the most useful info is
the number of outstanding references. But it may be a little too
unflexible as a statistic. BPF attached to the trace point may be
a better choice there, and tracepoints are already in place.