linux-kernel - Re: [PATCH 5/9] x86: Add documentation for rd/wr fs/gs base

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Message-ID: <4140.1458760485@turing-police.cc.vt.edu>
Date:	Wed, 23 Mar 2016 15:14:45 -0400
From:	Valdis.Kletnieks@...edu
To:	Andi Kleen <andi@...stfloor.org>
Cc:	x86@...nel.org, luto@...capital.net, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 5/9] x86: Add documentation for rd/wr fs/gs base

On Mon, 21 Mar 2016 09:16:05 -0700, Andi Kleen said:
> From: Andi Kleen <ak@...ux.intel.com>
>
> v2: Minor updates to documentation requested in review.

> +In addition the kernel needs to explicitly enable these instructions, as it
> +may otherwise not correctly context switch the state. Newer Linux
> +kernels enable this. When the kernel did not enable the instruction
> +they will fault with an #UD exception.

Looks OK for now, since the code hasn't actually landed.  However, once
we know for sure what release, we probably want to replace "Newer" with
"4.N or later" or something - particularly if the man-pages project will
be using this as source material.

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