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

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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>
This commit is contained in:
Martin Schwidefsky 2015-04-15 13:23:26 +02:00
commit 0b46e0a3ec
5 changed files with 59 additions and 100 deletions
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