(In reply to Andrey Grodzovsky from comment #8)
> I Wonder is there a way to reproduce this on x86 platform, from looking in
> kflags there is no  CONFIG_x86_4/16/64K_PAGES flags.

AFAIK there is only 4k page size on x86 possible for regular pages (non-huge).

Adding Ben to CC, he might have some ideas based on his work on the graphic
drivers for ppc64le in RHEL.