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Date: Tue, 26 Jul 2016 18:31:07 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@kernel.org>,
        "H . Peter Anvin" <hpa@zytor.com>, X86 ML <x86@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Brian Gerst <brgerst@gmail.com>, Kees Cook <keescook@chromium.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Byungchul Park <byungchul.park@lge.com>
Subject: Re: [PATCH 10/19] x86/dumpstack: add get_stack_info() interface
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On Tue, 26 Jul 2016 17:24:54 -0500
Josh Poimboeuf <jpoimboe@redhat.com> wrote:

> > This should be impossible unless that last entry is MCE.  If we
> > actually fire an event that isn't MCE early in NMI entry, something
> > already went very wrong.  
> 
> So we don't need to support breakpoints in the early NMI entry code?

Yes, if that happens, then bad things can really happen.

The only way a breakpoint could be added there, is perhaps with KGDB,
and that's just asking for trouble anyway.

-- Steve