On Tue, Jun 12, 2018 at 3:31 PM Nicholas Piggin <npiggin@xxxxxxxxx> wrote:
>
> Okay sure, and this is the reason for the wide cc list. Intel does
> need it of course, from 4.10.3.1 of the dev manual:
>
> — The processor may create a PML4-cache entry even if there are no
> translations for any linear address that might use that entry
> (e.g., because the P flags are 0 in all entries in the referenced
> page-directory-pointer table).
But does intel need it?
Because I don't see it. We already do the __tlb_adjust_range(), and we
never tear down the highest-level page tables afaik.
Am I missing something?
Linus
