* Toshi Kani <toshi.k...@hp.com> wrote:
> The PAT bit gets relocated to bit 12 when PUD and PMD mappings are used.
> This bit 12, however, is not covered by PTE_FLAGS_MASK, which is corrently
> used for masking pfn and flags for all cases.
>
> Patch 1/4-2/4 make changes necessary for patch 3/4 to use P?D_PAGE_MASK.
>
> Patch 3/4 fixes pud/pmd interfaces to handle the PAT bit when PUD and PMD
> mappings are used.
>
> Patch 3/4 fixes /sys/kernel/debug/kernel_page_tables to show the PAT bit
> properly.
>
> Note, the PAT bit is first enabled in 4.2-rc1 with WT mappings.
Are patches 1-3 only needed to fix /sys/kernel/debug/kernel_page_tables output,
or
are there other things fixed as well? The patches do not tell us any of that
information ...
Thanks,
Ingo
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