>>> On 27.12.12 at 03:18, Daniel Kiper <daniel.kiper at oracle.com> wrote: > Some implementations (e.g. Xen PVOPS) could not use part of identity page > table > to construct transition page table. It means that they require separate > PUDs, > PMDs and PTEs for virtual and physical (identity) mapping. To satisfy that > requirement add extra pointer to PGD, PUD, PMD and PTE and align existing > code. So you keep posting this despite it having got pointed out on each earlier submission that this is unnecessary, proven by the fact that the non-pvops Xen kernels can get away without it. Why? Jan