linux-kernel - Re: [PATCH v2 2/4] Add enabling of the R3 MWAIT during boot for KNL

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Message-ID: <alpine.DEB.2.20.1610121534130.8572@nanos>
Date:   Wed, 12 Oct 2016 15:35:09 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>
cc:     mingo@...hat.com, hpa@...or.com, x86@...nel.org, bp@...e.de,
        dave.hansen@...ux.intel.com, linux-kernel@...r.kernel.org,
        lukasz.daniluk@...el.com, james.h.cownie@...el.com
Subject: Re: [PATCH v2 2/4] Add enabling of the R3 MWAIT during boot for
 KNL

On Wed, 12 Oct 2016, Grzegorz Andrejczuk wrote:
> +	/*
> +	* Setting ring 3 MONITOR/MWAIT for all threads
> +	* when CPU is Xeon Phi Family x200
> +	* This can be disabled with phir3mwait=disable cmdline switch.
> +	* We preserve the reserved values and set only 2nd bit.
> +	* Ref:
> +	* https://software.intel.com/en-us/blogs/2016/10/06/intel-xeon-phi-product-family-x200-knl-user-mode-ring-3-monitor-and-mwait

Please don't put links like this into comments. They are stale before this
hits Linus tree.

Thanks,

	tglx