linux-kernel - Re: [RFC] netdev: debugging option

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Message-Id: <20080720.000509.20260185.davem@davemloft.net>
Date:	Sun, 20 Jul 2008 00:05:09 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	greearb@...delatech.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [RFC] netdev: debugging option

From: Stephen Hemminger <shemminger@...tta.com>
Date: Sat, 19 Jul 2008 23:04:24 -0700

> This adds a debugging option for network devices. It could grow to add other
> uses, but for now just add some messages about device reference counting.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>

I think this is useful but it could use some minor
mods before we put it in.

For example, this thing will spam the logs in at least two
common cases:

1) Lots of routing cache replacements

2) For older drivers using netif_rx() (and therefore, every
   current tunnel), every RX packet will trigger a log message

So we really need to add some kind of run time enable and also a
filter of some sort, even if it's just on device.
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