Re: [PATCH] x86, mm: Reserver some memory for bootmem allocator for NO_BOOTMEM

[Feng Tang]

On Thu, Aug 30, 2018 at 03:25:42PM +0200, Thomas Gleixner wrote:
 
> And where is the problem? We know that we need the fixmap during early boot
> anyway, so allocating the PTE page statically and setting it up early
> enough is not really rocket science. No allocator required.

Further check shows the page table for fixmap is already setup in [-12M, -10M],
but fixmap's address space breaks the expection under certain kernel config.
So here is another fix, please review, thanks!

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