linux-kernel - Re: Re: [RFC] arm: Add for atomic half word exchange

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Date:	Wed, 20 May 2015 08:57:36 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Sarbojit Ganguly <ganguly.s@...sung.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"Waiman.Long@...com" <Waiman.Long@...com>,
	"raghavendra.kt@...ux.vnet.ibm.com" 
	<raghavendra.kt@...ux.vnet.ibm.com>,
	"oleg@...hat.com" <oleg@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	SHARAN ALLUR <sharan.allur@...sung.com>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	VIKRAM MUPPARTHI <vikram.m@...sung.com>,
	SUNEEL KUMAR SURIMANI <suneel@...sung.com>
Subject: Re: Re: [RFC] arm: Add for atomic half word exchange

On Wed, May 20, 2015 at 05:09:34AM +0000, Sarbojit Ganguly wrote:
> Yes, the main advantage of Qspinlock code can be observed in NUMA but
> when I tested in an embedded system, a slight advantage was observed.

OK, great!

This is the first !x86 port I'm aware of and a load-store arch at that,
so its good to hear our efforts at making it generic actually paid off.
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