linux-kernel - Re: [PATCH net-next,1/1] hv_netvsc: call dump_rndis

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Message-Id: <20150421.203013.1642320994735532678.davem@davemloft.net>
Date:	Tue, 21 Apr 2015 20:30:13 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	sixiao@...rosoft.com
Cc:	kys@...rosoft.com, haiyangz@...rosoft.com,
	devel@...uxdriverproject.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next,1/1] hv_netvsc: call dump_rndis_message() only
 in netvsc debug mode

From: Simon Xiao <sixiao@...rosoft.com>
Date: Tue, 21 Apr 2015 22:14:14 +0000

> In current netvsc driver, for each packet received, it will call
> dump_rndis_message() to try to dump the rndis packet information by
> netdev_dbg().  In non-debug mode, dump_rndis_message() will not dump
> anything but it still initialize some local variables and process
> the switch logic in the function of dump_rndis_message(), which is
> unnecessary, especially in high network throughput situation.

See NETIF_MSG_* and use it properly in your driver, read other drivers
and learn how to properly use it for things like this.

I'm not going to explain this a third time.
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