Date: Fri, 11 Mar 2011 09:22:40 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tejun Heo <tj@kernel.org>, Roland McGrath <roland@redhat.com>,
        Oleg Nesterov <oleg@redhat.com>, jan.kratochvil@redhat.com,
        Denys Vlasenko <vda.linux@googlemail.com>,
        linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org
Subject: Re: [RFC] Proposal for ptrace improvements
Message-ID: <20110311082240.GA7624@elte.hu>
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* Steven Rostedt <rostedt@goodmis.org> wrote:

> I don't think perf has a good way to trace userspace yet.

uprobes are being worked on (and that comes integrated with perf), and that will 
give a good mechanism - and it (of course) wont be doing any context-switching.

Peter might be able to fill us in on the details of the review progress of the 
uprobes patches.

> ftrace focuses on the kernel.

It will hopefully be integrated into the perf ABI soon, so that developers and users 
have a unified event platform for doing tracing, profiling, event logging and more - 
all of which go back to a very similar looking event platform. (Not sure what's 
holding up that process - there's no technical roadblocks really - it 'just has to 
be done'.)

Thanks,

	Ingo
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