Re: [patch 1/2] x86, bts: fork and exit handling

[Ingo Molnar <mingo@elte.hu>]

* 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