linux-kernel - Re: [context tracking subsystem] Re: [GIT PULL rcu/next] One more RCU commit for 3.8

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Message-ID: <20121210151934.GS2516@linux.vnet.ibm.com>
Date:	Mon, 10 Dec 2012 07:19:34 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu,
	fweisbec@...il.com, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org
Subject: Re: [context tracking subsystem] Re: [GIT PULL rcu/next] One more
 RCU commit for 3.8

On Sat, Dec 08, 2012 at 03:37:57PM +0100, Ingo Molnar wrote:
> 
> * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > Hello, Ingo,
> > 
> > Could you please pull one more commit?  This is an update to Frederic
> > Weisbecker's context-tracking subsystem that is another stepping stone
> > towards adaptive-idle and tickless userspace execution.  This has been
> > subjected to -next testing.  It does give two checkpatch.pl errors,
> > but these are on cpp macro definitions used within assembly code -- and
> > following checkpatch.pl's suggestions would result in assembler errors.
> > (I have reported this to Andy Whitcroft, checkpatch.pl's maintainer.)
> > 
> > These changes are available in the git repository at:
> >   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
> > 
> > 							Thanx, Paul
> > 
> > ---------------->
> > Frederic Weisbecker (1):
> >       context_tracking: New context tracking susbsystem
> > 
> >  arch/Kconfig                                       |   15 ++--
> >  arch/x86/Kconfig                                   |    2 +-
> >  arch/x86/include/asm/{rcu.h => context_tracking.h} |   15 ++--
> >  arch/x86/kernel/entry_64.S                         |    2 +-
> >  arch/x86/kernel/ptrace.c                           |    8 +-
> >  arch/x86/kernel/signal.c                           |    5 +-
> >  arch/x86/kernel/traps.c                            |    2 +-
> >  arch/x86/mm/fault.c                                |    2 +-
> >  include/linux/context_tracking.h                   |   18 ++++
> >  include/linux/rcupdate.h                           |    2 -
> >  init/Kconfig                                       |   28 ++++----
> >  kernel/Makefile                                    |    1 +
> >  kernel/context_tracking.c                          |   83 ++++++++++++++++++++
> >  kernel/rcutree.c                                   |   64 +---------------
> >  kernel/sched/core.c                                |   11 ++-
> >  15 files changed, 150 insertions(+), 108 deletions(-)
> >  rename arch/x86/include/asm/{rcu.h => context_tracking.h} (63%)
> >  create mode 100644 include/linux/context_tracking.h
> >  create mode 100644 kernel/context_tracking.c
> 
> Pulled it and pushed it out earlier this week.
> 
> One issue I wanted to raise on a bit wider forum was the 
> introduction of the (small) kernel/context_tracking.c subsystem.
> 
> It makes sense to me, but I've Cc:-ed Linus and Andrew, in case 
> they have a different opinion.

And it does appear that Frederic and I have a bit more explaining to do.  ;-)

							Thanx, Paul

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