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Date: Wed, 17 Nov 2010 15:00:02 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Ted Ts'o" <tytso@mit.edu>, Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
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        Arjan van de Ven <arjan@infradead.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
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        Li Zefan <lizf@cn.fujitsu.com>, Jason Baron <jbaron@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Christoph Hellwig <hch@lst.de>, Pekka Enberg <penberg@kernel.org>,
        Lai Jiangshan <laijs@cn.fujitsu.com>,
        Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [ANNOUNCE] New utility: 'trace'
Message-ID: <20101117140002.GH27063@elte.hu>
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* Peter Zijlstra <peterz@infradead.org> wrote:

> On Wed, 2010-11-17 at 14:24 +0100, Ingo Molnar wrote:
> > > What about the filtering and other general features/functionality of
> > > ftrace?  Is the anticipation that this will be ported over to perf?
> > > What about things like blktrace?
> > 
> > Yeah, i'd love to see all that available. Filtering is available already on the 
> > kernel perf event side and could be added as an option. 
> 
> Except I utterly detest the existing filter code.. it runs _after_ we do all the 
> hard work and then makes us roll back when it decides we shouldn't output after 
> all.
> 
> But yes, it is functional.

I suspect that is what matters mostly - unless you think that it's impossible to 
have a sane implementation of it, if the users come.

Thanks,

	Ingo
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