KVM: MMU: Add cache miss statistic

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 9a57e1a..8f12ec5 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -715,6 +715,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
                        pgprintk("%s: found\n", __FUNCTION__);
                        return sp;
                }
+       ++vcpu->kvm->stat.mmu_cache_miss;
        sp = kvm_mmu_alloc_page(vcpu, parent_pte);
        if (!sp)
                return sp;

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 733bff6..fa9e42c 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -73,6 +73,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
        { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
        { "mmu_flooded", VM_STAT(mmu_flooded) },
        { "mmu_recycled", VM_STAT(mmu_recycled) },
+       { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
        { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
        { NULL }
 };

diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 28940e1..ced1beb 100644 (file)
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -289,6 +289,7 @@ struct kvm_vm_stat {
        u32 mmu_pde_zapped;
        u32 mmu_flooded;
        u32 mmu_recycled;
+       u32 mmu_cache_miss;
        u32 remote_tlb_flush;
 };