linux-kernel - Re: [RFC][PATCH 2/3] perf: Take a hot regs snapshot for trace events

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Message-ID: <20100304220941.GC8169@nowhere>
Date:	Thu, 4 Mar 2010 23:09:43 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Greg KH <greg@...ah.com>
Subject: Re: [RFC][PATCH 2/3] perf: Take a hot regs snapshot for trace
	events

On Thu, Mar 04, 2010 at 05:02:48PM -0500, Steven Rostedt wrote:
> On Thu, 2010-03-04 at 22:37 +0100, Frederic Weisbecker wrote:
> 
> > > I can keep the debug/tracing/events/* as is too, where the format and id
> > > just call the same routines that the eventfs calls, but add the enable
> > > and filter to be specific to ftrace.
> > 
> > 
> > The /debug/tracing/events could contain symlinks for the format
> > files so that the rest can stay there.
> 
> Symlinks buy us nothing but headaches. This is a pseudo filesystem, we
> can use the same code that generates the file with no extra overhead.


Yeah, you're right.

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