• Marcelo Tosatti's avatar
    KVM: MMU: large page support · 05da4558
    Marcelo Tosatti authored
    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: default avatarMarcelo Tosatti <mtosatti@redhat.com>
    Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
    05da4558
x86.c 80.1 KB