RE: [tip:tracing/core] x86, bts: reenable ptrace branch trace support

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On Wed, 2009-06-10 at 14:22 +0100, Metzger, Markus T wrote:
> 
> The Debug Store interface is completely in-kernel. It does not expose
> anything to the outside world.
> 
> What we expose is a ptrace interface for branch tracing.
> That this is built on top of Debug Store is completely hidden.
> The Debug Store interface may be changed without impacting the
> user-visible part at any time.
> 
> I do think that a ptrace interface makes sense since debuggers are the
> targeted users for branch tracing.
> 
> I don't see why we should not merge the fixes now and then rework the
> in-kernel parts as needed for supporting PEBS.

Ok, so what is all that account_locked_memory() for?
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