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Date: Fri, 3 Aug 2012 13:31:44 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Steven Rostedt <rostedt@...dmis.org> Cc: Ingo Molnar <mingo@...nel.org>, Frederic Weisbecker <fweisbec@...il.com>, LKML <linux-kernel@...r.kernel.org>, Alessio Igor Bogani <abogani@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Avi Kivity <avi@...hat.com>, Chris Metcalf <cmetcalf@...era.com>, Christoph Lameter <cl@...ux.com>, Geoff Levand <geoff@...radead.org>, Gilad Ben Yossef <gilad@...yossef.com>, Hakan Akkan <hakanakkan@...il.com>, "H. Peter Anvin" <hpa@...or.com>, Kevin Hilman <khilman@...com>, Max Krasnyansky <maxk@...lcomm.com>, Peter Zijlstra <peterz@...radead.org>, Stephen Hemminger <shemminger@...tta.com>, Sven-Thorsten Dietrich <thebigcorporation@...il.com>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH 1/5] code_domain: New code domain tracking susbsystem On Fri, Aug 03, 2012 at 04:09:39PM -0400, Steven Rostedt wrote: > On Fri, 2012-08-03 at 21:45 +0200, Ingo Molnar wrote: > > * Frederic Weisbecker <fweisbec@...il.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 Plus: user/kernel space > ;-) Then there is "supervisor", "system", "privileged", and who knows what all else for "kernel". And "application" and "problem" and probably others for "user". Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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