> > the point is designating pte levels by numbers, not by names.
> > in this way we can more easily deal with arbitrary numbers of pte levels.
> 
> I'm wondering
> - how your patch can make arbitrary numbers of pte levels easier to deal
>   with

i said "more easily".
the patch itsself doesn't immediately make it possible.

> - why it is a benefit to support arbitrary numbers of pte levels, if
>   considering the current 3-level, 52-bit address space on amd64 seems to
>   be enough for the next 20 years.

i meant "from 2 to 4" by "arbitrary".

YAMAMOTO Takashi