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SubjectRe: [PATCH] x86: fix Intel Mac booting with EFI

* Ingo Molnar <mingo@elte.hu> wrote:

> * Hugh Dickins <hugh@veritas.com> wrote:
>
> > Fedora reports that mem_init()'s zap_low_mappings(), extended to SMP
> > in 61165d7a035f6571c7576e7f51e7230157724c8d x86: fix app crashes after
> > SMP resume causes 32-bit Intel Mac machines to reboot very early when
> > booting with EFI.
> >
> > The EFI code appears to manage low mappings for itself when needed;
> > but like many before it, confuses PSE with PAE. So it has only been
> > mapping half the space it needed when PSE but not PAE. This remained
> > unnoticed until we moved the SMP zap_low_mappings() before
> > efi_enter_virtual_mode(). Presumably could have been noticed years
> > ago if anyone ran a UP kernel on such machines?
>
> good spotting!
>
> Acked-by: Ingo Molnar <mingo@elte.hu>

and also applied to x86/urgent.

Ingo


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