linux-kernel - Re: [ 05/48] x86_64, switch_to(): Load TLS descriptors before switching DS and ES

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Message-ID: <20150515221527.GD19417@two.firstfloor.org>
Date:	Sat, 16 May 2015 00:15:27 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	Andi Kleen <andi@...stfloor.org>, Willy Tarreau <w@....eu>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [ 05/48] x86_64, switch_to(): Load TLS descriptors before
 switching DS and ES

On Fri, May 15, 2015 at 09:53:43PM +0100, Ben Hutchings wrote:
> On Fri, 2015-05-15 at 17:53 +0200, Andi Kleen wrote:
> > > 
> > > v2.6.32.65:arch/x86/kernel/process_64.c:425:    /* Must be after DS reload */
> > > 
> > > If this comment is correct then the patch will cause a regression for
> > > FPU state management.  The comment was introduced by:
> > 
> > Yes I already stated before that these super-risky patches
> > are not stable material.
> [...]
> 
> Which other patches do you include in that?

Sorry I misspoke. Currently it's only that one.

-Andi
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