linux-kernel - Re: Multiple Tracers

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Date:	Thu, 9 Apr 2009 06:38:41 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Li Zefan <lizf@...fujitsu.com>, Jens Axboe <jens.axboe@...cle.com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	rostedt@...dmis.org, linux-kernel@...r.kernel.org,
	mingo@...hat.com, axboe@...nel.dk
Subject: Re: Multiple Tracers


* Li Zefan <lizf@...fujitsu.com> wrote:

> >>> Tom Zanussi (Cc:-ed) recently converted the blktrace tracepoints to 
> >> I guess you mean Arnaldo <acme@...hat.com> ;)
> > 
> > Nope, Tom:
> > 
> > Message-Id: <1235725261.8512.89.camel@...rm-linux>
> >  
> 
> Ah, sorry for the mistake, I didn't notice that patch, and I 
> thought Ingo meant the ftrace-plugin patch.

yeah - i meant the Zed-trace patches Tom posted some time ago.

I think it would be nice to use the blktrace bits of it too, to 
extend built-in user-defined per tracepoint filtering expressions to 
blktrace and to make blktrace events more generally available. It 
does not impact existing blktrace functionality, it extends on it.

	Ingo
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