tree a76d699e60aca4f775d5f67254214654235e2e17
parent 2e53d63acba75795aa226febd140f67c58c6a353
author Marcelo Tosatti <marcelo@kvack.org> 1203777870 -0300
committer Avi Kivity <avi@qumranet.com> 1209286405 +0300

KVM: MMU: large page support

Create large pages mappings if the guest PTE's are marked as such and
the underlying memory is hugetlbfs backed.  If the largepage contains
write-protected pages, a large pte is not used.

Gives a consistent 2% improvement for data copies on ram mounted
filesystem, without NPT/EPT.

Anthony measures a 4% improvement on 4-way kernbench, with NPT.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>