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| author | Marcelo Tosatti | 2008-02-23 15:44:30 +0100 |
|---|---|---|
| committer | Avi Kivity | 2008-04-27 10:53:25 +0200 |
| commit | 05da45583de9b383dc81dd695fe248431d6c9f2b (patch) | |
| tree | a76d699e60aca4f775d5f67254214654235e2e17 /arch/x86/kvm/x86.c | |
| parent | KVM: MMU: ignore zapped root pagetables (diff) | |
| download | kernel-qcow2-linux-05da45583de9b383dc81dd695fe248431d6c9f2b.tar.gz kernel-qcow2-linux-05da45583de9b383dc81dd695fe248431d6c9f2b.tar.xz kernel-qcow2-linux-05da45583de9b383dc81dd695fe248431d6c9f2b.zip | |
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>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e8e64927bddc..0458bd516185 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -88,6 +88,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "mmu_recycled", VM_STAT(mmu_recycled) }, { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, + { "largepages", VM_STAT(lpages) }, { NULL } }; |