Re: [PATCH] x86: Construct 32 bit boot time page tables in native format.

[Rafael J. Wysocki]

On Monday, 28 of January 2008, H. Peter Anvin wrote:
> Rafael J. Wysocki wrote:
> > On Monday, 28 of January 2008, Jeremy Fitzhardinge wrote:
> >> Rafael J. Wysocki wrote:
> >>> Actually, no.  We only do that with the kernel code mapping which should be
> >>> safe as long as TLBs are not flushed (and they aren't).
> >>>   
> >> Er, what?  Assuming the TLB will retain some mappings while you 
> >> overwrite the pagetable is a highly dubious prospect.  Are you copying 
> >> the same values over, or something else?
> > 
> > As long as a relocatable kernel is not used to restore a non-relocatable one
> > (or vice versa), we're copying the same values over.
> > 
> 
> So that case is deliberately considered broken?

Not deliberately, but the fix I had caused a regression.  It's just a pending
issue.

Rafael
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