linux-kernel - Re: [PATCH v2 0/4] MCS Lock: MCS lock code cleanup and optimizations

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Date:	Tue, 05 Nov 2013 13:27:33 -0800
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Michel Lespinasse <walken@...gle.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
	linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Waiman Long <waiman.long@...com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Alex Shi <alex.shi@...aro.org>,
	Andi Kleen <andi@...stfloor.org>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Matthew R Wilcox <matthew.r.wilcox@...el.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Rik van Riel <riel@...hat.com>,
	Peter Hurley <peter@...leysoftware.com>,
	"Paul E.McKenney" <paulmck@...ux.vnet.ibm.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	George Spelvin <linux@...izon.com>,
	"H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v2 0/4] MCS Lock: MCS lock code cleanup and
 optimizations

On Tue, 2013-11-05 at 13:14 -0800, Michel Lespinasse wrote:
> On Tue, Nov 5, 2013 at 9:42 AM, Tim Chen <tim.c.chen@...ux.intel.com> wrote:
> > In this patch series, we separated out the MCS lock code which was
> > previously embedded in the mutex.c.  This allows for easier reuse of
> > MCS lock in other places like rwsem and qrwlock.  We also did some micro
> > optimizations and barrier cleanup.
> >
> > This patches were previously part of the rwsem optimization patch series
> > but now we spearate them out.
> >
> > Tim Chen
> >
> > v2:
> > 1. change export mcs_spin_lock as a GPL export symbol
> > 2. corrected mcs_spin_lock to references
> >
> > Jason Low (2):
> >   MCS Lock: optimizations and extra comments
> >   MCS Lock: Barrier corrections
> >
> > Tim Chen (1):
> >   MCS Lock: Restructure the MCS lock defines and locking code into its
> >     own file
> >
> > Waiman Long (1):
> >   MCS Lock: Make mcs_spinlock.h includable in other files
> >
> >  include/linux/mcs_spinlock.h |   99 ++++++++++++++++++++++++++++++++++++++++++
> >  include/linux/mutex.h        |    5 +-
> >  kernel/Makefile              |    6 +-
> >  kernel/mcs_spinlock.c        |   21 +++++++++
> >  kernel/mutex.c               |   60 +++----------------------
> >  5 files changed, 133 insertions(+), 58 deletions(-)
> >  create mode 100644 include/linux/mcs_spinlock.h
> >  create mode 100644 kernel/mcs_spinlock.c
> 
> What base kernel does this apply over ?
> 

Should be applicable on latest v3.12-rc7.

Tim

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