linux-kernel - Re: [PATCH 09/15] xen/trace: add tlb flush tracepoints

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Message-ID: <4E03C510.5050801@goop.org>
Date:	Thu, 23 Jun 2011 15:58:24 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Xen Devel <Xen-devel@...ts.xensource.com>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: Re: [PATCH 09/15] xen/trace: add tlb flush tracepoints

On 06/23/2011 01:23 PM, Steven Rostedt wrote:
> Ouch! I didn't notice this before. Do you really need this empty event?
> Why not just use the function tracer for this? It should work.

Yes, it should, but it would be nice to present something that's
consistent with all the other tlb-related tracepoints.

> If you really need something like this, maybe I'll add a
> DEFINE_EVENT_NOARGS() that will not require arguments and can eliminate
> a lot of code that TRACE_EVENT() adds.

If you like, but only if you think its worth the effort.  The empty
string thing is a bit of an ugly hack, but its not like it makes a mess
everywhere.

    J
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