From: Avi Kivity <avi@qumranet.com>
Date: Tue, 18 Dec 2007 17:47:18 +0000 (+0200)
Subject: KVM: MMU: Add cache miss statistic
X-Git-Tag: v2.6.25-rc1~1138^2~17
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dfc5aa00cbe888d3a9ea97775bbac74cb1c1a1d8;p=linux-2.6

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 9a57e1a014..8f12ec52ad 100644
--- 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 733bff65d9..fa9e42c037 100644
--- 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 28940e1a97..ced1bebabb 100644
--- 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;
 };