Re: Dealing with the NMI mess

[Steven Rostedt]

On Fri, 24 Jul 2015 17:26:37 +0200
Willy Tarreau <w@xxxxxx> wrote:

 
> > The point is, if we trigger a #DB on an instruction breakpoint
> > while !IF, then we simply disable that breakpoint and do the RET.
> 
> Yes but the breakpoint remains disabled then. Or I'm missing
> something.

Do we care? If it was an instruction breakpoint with !IF set, then it
had to have happened in the kernel. And kgdb or whatever added it there
needs to deal with that.

There should be no instances in the kernel where we execute userspace
code with interrupts disabled.

-- Steve
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