linux-kernel - Re: [PATCH v8 01/10] qspinlock: A generic 4-byte queue spinlock implementation

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Date:	Fri, 4 Apr 2014 19:54:52 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Waiman Long <waiman.long@...com>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-arch@...r.kernel.org,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	xen-devel@...ts.xenproject.org, kvm@...r.kernel.org,
	Paolo Bonzini <paolo.bonzini@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>,
	Chegu Vinod <chegu_vinod@...com>,
	Marcos Matsunaga <Marcos.Matsunaga@...cle.com>
Subject: Re: [PATCH v8 01/10] qspinlock: A generic 4-byte queue spinlock
 implementation


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

> On 04/04/2014 12:57 PM, Konrad Rzeszutek Wilk wrote:
> >On Fri, Apr 04, 2014 at 03:00:12PM +0200, Peter Zijlstra wrote:
> >>So I'm just not ever going to pick up this patch; I spend a week trying
> >>to reverse engineer this; I posted a 7 patch series creating the
> >>equivalent, but in a gradual and readable fashion:
> >>
> >>   http://lkml.kernel.org/r/20140310154236.038181843@infradead.org
> >>
> >>You keep on ignoring that; I'll keep on ignoring your patches.
> >>
> >>I might at some point rewrite some of your pv stuff on top to get this
> >>moving again, but I'm not really motivated to work with you atm.
> >Uh? Did you CC also xen-devel@...ts.xenproject.org on your patches Peter?
> >I hadn't had a chance to see or comment on them :-(
> >
> 
> Peter's patch is a rewrite of my patches 1-4, there is no PV or 
> unfair lock support in there.

It is a fine grained split-up, which does one thing at a time, so it 
all becomes reviewable and mergable (and the claimed effects become 
testable!). Please use that as a base.

Thanks,

	Ingo
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