netdev - Re: [RFC PATCH net] net/core: don't increment rx

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Message-Id: <20160124.224222.1748787418887617295.davem@davemloft.net>
Date:	Sun, 24 Jan 2016 22:42:22 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jarod@...hat.com
Cc:	linux-kernel@...r.kernel.org, edumazet@...gle.com,
	jiri@...lanox.com, daniel@...earbox.net, tom@...bertland.com,
	j.vosburgh@...il.com, vfalico@...il.com, gospo@...ulusnetworks.com,
	netdev@...r.kernel.org
Subject: Re: [RFC PATCH net] net/core: don't increment rx_dropped on
 inactive slaves

From: Jarod Wilson <jarod@...hat.com>
Date: Fri, 22 Jan 2016 14:11:22 -0500

> diff --git a/net/core/dev.c b/net/core/dev.c
> index 8cba3d8..1354c7b 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -4153,8 +4153,11 @@ ncls:
>  		else
>  			ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
>  	} else {
> +		if (deliver_exact)
> +			goto inactive; /* bond or team inactive slave */
>  drop:
>  		atomic_long_inc(&skb->dev->rx_dropped);
> +inactive:
>  		kfree_skb(skb);
>  		/* Jamal, now you will not able to escape explaining
>  		 * me how you were going to use this. :-)
> -- 
> 1.8.3.1
> 

I agree that rx_dropped is not the correct stat to bump here, but
I'm totally against the event disappearing completely into thin
air.

You have to replace the rx_dropped bump with _something_.

The only reason this hasn't been "fixed" yet is that everyone is
too damn lazy to implement that "something".