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

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Message-ID: <20121208143757.GB12011@gmail.com>
Date:	Sat, 8 Dec 2012 15:37:57 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	mingo@...e.hu, fweisbec@...il.com, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org
Subject: [context tracking subsystem] Re: [GIT PULL rcu/next] One more RCU
 commit for 3.8


* 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.

Thanks,

	Ingo
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