linux-kernel - Re: [PATCH v2 1/5] x86, fpu: decouple non-lazy/eager fpu restore from xsave

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Message-ID: <20120917191107.GA30665@elf.ucw.cz>
Date:	Mon, 17 Sep 2012 21:11:08 +0200
From:	Pavel Machek <pavel@....cz>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	hpa@...or.com, mingo@...nel.org, torvalds@...ux-foundation.org,
	andreas.herrmann3@....com, bp@...64.org, robert.richter@....com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] x86, fpu: decouple non-lazy/eager fpu restore
 from xsave

Hi!

irely omitted.
>  			and restore using xsave. The kernel will fallback to
>  			enabling legacy floating-point and sse state.
>  
> +	eagerfpu=	[X86]
> +			on	enable eager fpu restore
> +			off	disable eager fpu restore
> +

Hmm. Only useful piece of information here is that this is about FPU
_restore_. Otherwise it tells the user exactly nothing.

Why would user want to enable it? Disable it? What is the default?

    	       	       	      	  	      	      	  Pavel 
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