netdev - Re: [PATCH net-next 11/11] sfc: Add static tracepoints to datapath

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Date:	Mon, 23 Sep 2013 14:17:23 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: Re: [PATCH net-next 11/11] sfc: Add static tracepoints to datapath

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Mon, 23 Sep 2013 16:51:07 +0100

> 2. Generic trace events would be subject to changes that could make them
> unsuitable for Solarflare's tests.

This is not an argument for doing things privately in your driver and
duplicating things.

We should make a facility that's useful to Solarflare _AS WELL AS_
everyone else.

> 4. Static tracepoints always have run-time overhead, so these should
> probably be controlled by a kconfig option (as in this patch).

Don't we use static branches and other tricks to make them close to zero
overhead?
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