linux-kernel - Re: [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX capable hardware"

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Message-ID: <CA+55aFzxdGOW=7-x+41U4SZB5par7jKU9vuuhFdsQfZOuLiLtw@mail.gmail.com>
Date:	Mon, 20 May 2013 10:21:09 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Fernando Luis Vázquez Cao <fernando@....ntt.co.jp>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX
 capable hardware"

On Mon, May 20, 2013 at 9:43 AM, Michal Hocko <mhocko@...e.cz> wrote:
>
> The configuration has been posted in the referenced thread:
> https://lkml.org/lkml/2013/5/14/398

Hmm. That's a regular intel i5 Sandybridge CPU. Which certainly has NX.

Hmm. secondary_startup_64 isn't __initcode, is it? I think it's used
for resuming the other CPU's too and for CPU hotplug. Yes/no?

If so early_pmd_flags shouldn't be __initdata, I think.

Michal, does it work if you don't do the revert, but just remove the
__initdata instead?

              Linus
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