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Subject: Re: [PATCH 1/5] code_domain: New code domain tracking susbsystem
From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Alessio Igor Bogani <abogani@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>, Avi Kivity <avi@redhat.com>,
        Chris Metcalf <cmetcalf@tilera.com>, Christoph Lameter <cl@linux.com>,
        Geoff Levand <geoff@infradead.org>,
        Gilad Ben Yossef <gilad@benyossef.com>,
        Hakan Akkan <hakanakkan@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>,
        Kevin Hilman <khilman@ti.com>, Max Krasnyansky <maxk@qualcomm.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Stephen Hemminger <shemminger@vyatta.com>,
        Sven-Thorsten Dietrich <thebigcorporation@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 03 Aug 2012 16:09:39 -0400
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On Fri, 2012-08-03 at 21:45 +0200, Ingo Molnar wrote:
> * Frederic Weisbecker <fweisbec@gmail.com> wrote:
> 
> > Create a new subsystem that handles the probing on kernel 
> > boundaries to keep track of the transitions between code 
> > domains with two basic initial domains: user or kernel.
> 
> To do a bit more bike shed painting, I'd call it "context 
> tracking" - user mode, kernel mode (guest mode, etc.).
> 
> The term 'code domain' would bring up blank stares from most 
> kernel developers, me thinks.

Heh, that would be a second new term I heard this week for context.
Earlier, I noticed that Paul McKenney called it 'levels'. So now there's
four names:

user/kernel context
user/kernel state
user/kernel level
user/kernel domain

And we could probably add a fifth:

user/kernel mode

;-)

-- Steve