linux-kernel - Re: [PATCH v2 1/4] x86, mwaitt: add monitorx and mwaitx instruction

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Date:	Tue, 9 Jun 2015 17:48:56 +0800
From:	Huang Rui <ray.huang@....com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Borislav Petkov <bp@...e.de>,
	Andy Lutomirski <luto@...capital.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	John Stultz <john.stultz@...aro.org>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"Fengguang Wu" <fengguang.wu@...el.com>,
	Aaron Lu <aaron.lu@...el.com>,
	"Suthikulpanit, Suravee" <Suravee.Suthikulpanit@....com>,
	"Li, Tony" <Tony.Li@....com>, "Xue, Ken" <Ken.Xue@....com>
Subject: Re: [PATCH v2 1/4] x86, mwaitt: add monitorx and mwaitx instruction

On Tue, Jun 09, 2015 at 04:23:06PM +0800, Peter Zijlstra wrote:
> On Tue, Jun 09, 2015 at 11:13:38AM +0800, Huang Rui wrote:
> > 
> > MWAITX ECX[1]: enable timer if set
> > MWAITX EBX[31:0]: max wait time expressed in SW P0 clocks
> > 
> > The software P0 frequency is the same as the TSC frequency.
> > 
> > Max timeout = EBX/(TSC frequency)
> 
> ^ that, would make a lovely comment for this v
> 

Any better suggestion? EBX * (TSC cycle) ? :)

Thanks,
Rui
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