linux-kernel - Re: [PATCH] x86, acpi, idle: Restructure the mwait idle routines

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Message-ID: <20131120163313.GR10022@twins.programming.kicks-ass.net>
Date:	Wed, 20 Nov 2013 17:33:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Jacob Pan <jacob.jun.pan@...ux.intel.com>, lenb@...nel.org,
	rjw@...ysocki.net, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, shaohua.li@...el.com,
	rui.zhang@...el.com, Mike Galbraith <bitbucket@...ine.de>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>, hpa@...or.com
Subject: Re: [PATCH] x86, acpi, idle: Restructure the mwait idle routines

On Wed, Nov 20, 2013 at 08:24:47AM -0800, Arjan van de Ven wrote:
> On 11/20/2013 2:58 AM, Peter Zijlstra wrote:
> >So pretty silly actually; you cannot do a store (any store) in between
> >monitor and mwait.
> 
> you can
> just not to the cacheline you are watching (or things that alias with that)

Ah indeed, the thread_info::status is in the same cacheline.
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