Re: [PATCH] Revert "x86-64, init: Do not set NX bits on non-NX capablehardware"

From: H. Peter Anvin
Date: Mon May 20 2013 - 14:13:35 EST

On 05/20/2013 10:21 AM, Linus Torvalds wrote:
> On Mon, May 20, 2013 at 9:43 AM, Michal Hocko <mhocko@xxxxxxx> wrote:
>> The configuration has been posted in the referenced thread:
> 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?

Indeed. Looks like we corrupt a random bit in memory on resume.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at