tree 011ed5650974aad0df2e6a6c9952e1fc2f935dec
parent 7e01b5acd88b3f3108d8c4ce44e3205d67437202
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1429097006 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1429800949 +0200

s390/kvm: remove delayed reallocation of page tables for KVM

Replacing a 2K page table with a 4K page table while a VMA is active
for the affected memory region is fundamentally broken. Rip out the
page table reallocation code and replace it with a simple system
control 'vm.allocate_pgste'. If the system control is set the page
tables for all processes are allocated as full 4K pages, even for
processes that do not need it.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>