[Xen-devel] Re: __supported_pte_mask breaks PROT_NONE pages

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
>   
> > Ingo Molnar wrote:
> >     
> > > btw., did you actually see a boot crash due to this, on a pre-PGE system?
> > >   
> > >       
> > No, under Xen, since it also disables PGE.
> >     
> but it was a boot crash, right? Such info is useful in the first line of a 
> commit message:
>   Impact: fix non-PGE boot crash
>
> (that also makes it less likely that the commit is under-prioritized.)
It's not immediate; in early usermode.  It only happens when using a 
populated PROTNONE page, which is actually pretty rare, it seems - 
perhaps made more common by the new mlock code.  But, yes, it stopped my 
machine from booting.
   J

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