linux-kernel - Re: [PATCH v4 0/4] mutex: Improve mutex performance by doing less atomic-ops & better spinning

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Date:	Fri, 19 Apr 2013 09:37:31 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Waiman Long <Waiman.Long@...com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Dave Jones <davej@...hat.com>,
	Clark Williams <williams@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	linux-arch@...r.kernel.org,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	"Norton, Scott J" <scott.norton@...com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH v4 0/4]  mutex: Improve mutex performance by doing less
 atomic-ops & better spinning


* Waiman Long <Waiman.Long@...com> wrote:

> v3->v4
>  - Merge patch 4 into patch 2
>  - Move patch 5 forward to become patch 1
> 
> v2->v3
>   - Add patch 4 to remove new typedefs introduced in patch 2.
>   - Add patch 5 to remove SCHED_FEAT_OWNER_SPIN and move the mutex
>     spinning code to mutex.c.
> 
> v1->v2
>  - Remove the 2 mutex spinner patches and replaced it by another one
>    to improve the mutex spinning process.
>  - Remove changes made to kernel/mutex.h & localize changes in
>    kernel/mutex.c.
>  - Add an optional patch to remove architecture specific check in patch
>    1.

The patches look pretty nice now - thanks Waiman. I have applied them to 
tip:core/locking and started testing them.

Thanks,

	Ingo
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