linux-kernel - Re: [Patch -tip 1/3] Tracing/ftrace: Relay unhandled entry output

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Date:	Thu, 25 Sep 2008 19:01:49 +0300
From:	Pekka Paalanen <pq@....fi>
To:	"Frédéric Weisbecker" <fweisbec@...il.com>
Cc:	"Steven Rostedt" <rostedt@...dmis.org>,
	"Ingo Molnar" <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [Patch -tip 1/3] Tracing/ftrace: Relay unhandled entry output

On Thu, 25 Sep 2008 17:56:32 +0200
"Frédéric Weisbecker" <fweisbec@...il.com> wrote:

> 2008/9/25 Pekka Paalanen <pq@....fi>:
> > My understanding is that the pipe will be broken only, if the trace
> > framework believes tracing is disabled. Recall the discussion about
> > tracer_enabled = 0. Which is a bug, and I hoped Steven would have
> > commented on how to fix that properly.
> >
> > Or was it fixed already, and this is a different issue?
> > I didn't notice.
> 
> Actually there was two bugs which broke the pipe:
> _ As you say the old one when none tracer put tracer_enabled = 0
> _ And the new one I described here.
> 
> I think the first is fixed since none tracer has been replaced by "nop
> tracer" (a recently implemented) which doesn't touch
> tracer_enabled at all.

Oh cool, sounds like I should try linux-next when I can.

-- 
Pekka Paalanen
http://www.iki.fi/pq/
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