netdev - Re: [PATCH net-next v8] net/core: Introduce netdev_core_stats

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Date: Tue, 10 Oct 2023 09:31:10 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: Yajun Deng <yajun.deng@...ux.dev>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Alexander Lobakin <aleksander.lobakin@...el.com>
Subject: Re: [PATCH net-next v8] net/core: Introduce netdev_core_stats_inc()

On Mon, Oct 9, 2023 at 1:16 PM Yajun Deng <yajun.deng@...ux.dev> wrote:
>
> Although there is a kfree_skb_reason() helper function that can be used to
> find the reason why this skb is dropped, but most callers didn't increase
> one of rx_dropped, tx_dropped, rx_nohandler and rx_otherhost_dropped.
>
> For the users, people are more concerned about why the dropped in ip
> is increasing.
>
> Introduce netdev_core_stats_inc() for trace the caller of
> dev_core_stats_*_inc().
>
> Also, add __code to netdev_core_stats_alloc(), as it's called with small
> probability. And add noinline make sure netdev_core_stats_inc was never
> inlined.
>
> Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
> Suggested-by: Alexander Lobakin <aleksander.lobakin@...el.com>

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks.