Re: -tip tree resume fail, bisect to 5bd5a45(x86: Add NX protectionfor kernel data)

[mat]

Le Mon, 22 Nov 2010 17:42:47 +0100,
Andi Kleen <andi@xxxxxxxxxxxxxx> a écrit :

> > That seems to be a S3 specific code path, that won't fix anything.
> > Simply do:
> > 
> > echo 0 > /sys/devices/system/cpu/cpu1/online;
> > echo 1 > /sys/devices/system/cpu/cpu1/online;
> > 
> > and your machine will explode..
> 
> The SMP startup trampoline is copied I believe
> and only executed in real mode without page tables.
> 
> So it's perhaps not the trampoline, but the early startup 
> code that ends up being broken.
yes :
acpi wakeup code and smp trampoline are copied in low memory (first
1MB).

So they can't end up int the kernel data mapping ?

So it should something else.

I will try to investigate on this.

Matthieu
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