Date: Sat, 20 Dec 2008 09:17:55 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Markus Metzger <markus.t.metzger@intel.com>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, hpa@zytor.com,
       markus.t.metzger@gmail.com, roland@redhat.com, eranian@googlemail.com
Subject: Re: [patch 1/2] x86, bts: fork and exit handling
Message-ID: <20081220081755.GA5581@elte.hu>
References: <20081219151024.A4960@sedona.ch.intel.com>
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* Markus Metzger <markus.t.metzger@intel.com> wrote:

> Add arch_ptrace_untrace() function that is called when the tracer
> detaches (either voluntarily or when the tracing task dies);
> ptrace_disable() is only called on a voluntary detach.
> 
> Add ptrace_fork() and arch_ptrace_fork(). They are called when a
> traced task is forked.
> 
> Clear DS and BTS related fields on fork.
> 
> Release DS resources and reclaim memory in ptrace_untrace(). This
> releases resources already when the tracing task dies. We used to do
> that when the traced task dies.
> 
> Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>

applied to tip/tracing/hw-branch-tracer, thanks Markus! It's a nice 
cleanup too - to tear down any arch-level ptrace state that might come 
around.

	Ingo
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