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

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Message-ID: <CANN689He+1uW2UpfLtjrtBO8_F=5EX4MnynXbp8rV7uTeD+5aw@mail.gmail.com>
Date:	Tue, 5 Nov 2013 13:14:16 -0800
From:	Michel Lespinasse <walken@...gle.com>
To:	Tim Chen <tim.c.chen@...ux.intel.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, 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 ?

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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