From e8ec9696180473e1a1de6a904230d1064ab7c94b Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@qumranet.com>
Date: Tue, 20 Nov 2007 23:01:14 +0200
Subject: [PATCH] --- yaml --- r: 80767 b: refs/heads/master c:
 0f74a24c59b814c1c8085251cbea48d339f0c7c6 h: refs/heads/master i:   80765:
 8d2f52e37d9fb2435526559cd3f2579c1a4726ec   80763:
 892b4ea89ee1e534c26a5b181d2a77b8a23bbc9b   80759:
 4ea904b873a4f63e7ae817889b81939527eab54a   80751:
 77b0903c8bcee45004aecfde2b87d85aed001270   80735:
 0769b936a52e33ed5b9e406218fc2087e6ab20f1   80703:
 4dee9cab2a458dddccb5f31abe8ffd53cf7f3186   80639:
 4ec94ccb2de9dac565c2dade08a027ee7be0ad31 v: v3

---
 [refs]                       | 2 +-
 trunk/drivers/kvm/kvm.h      | 1 +
 trunk/drivers/kvm/kvm_main.c | 3 +++
 trunk/drivers/kvm/x86.c      | 1 +
 4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 51f2f1583d6a..100a658b18c1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e5a4c8cad952d6e060991841f3632578ab3ae133
+refs/heads/master: 0f74a24c59b814c1c8085251cbea48d339f0c7c6
diff --git a/trunk/drivers/kvm/kvm.h b/trunk/drivers/kvm/kvm.h
index b65f5dee4b1b..048849d97b35 100644
--- a/trunk/drivers/kvm/kvm.h
+++ b/trunk/drivers/kvm/kvm.h
@@ -300,6 +300,7 @@ struct kvm_vm_stat {
 	u32 mmu_pde_zapped;
 	u32 mmu_flooded;
 	u32 mmu_recycled;
+	u32 remote_tlb_flush;
 };
 
 struct kvm {
diff --git a/trunk/drivers/kvm/kvm_main.c b/trunk/drivers/kvm/kvm_main.c
index 7939b5c9a4b4..aec6b67cfebb 100644
--- a/trunk/drivers/kvm/kvm_main.c
+++ b/trunk/drivers/kvm/kvm_main.c
@@ -115,6 +115,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
 		if (cpu != -1 && cpu != raw_smp_processor_id())
 			cpu_set(cpu, cpus);
 	}
+	if (cpus_empty(cpus))
+		return;
+	++kvm->stat.remote_tlb_flush;
 	smp_call_function_mask(cpus, ack_flush, NULL, 1);
 }
 
diff --git a/trunk/drivers/kvm/x86.c b/trunk/drivers/kvm/x86.c
index b482b6a8a828..ac09f381f47f 100644
--- a/trunk/drivers/kvm/x86.c
+++ b/trunk/drivers/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) },
+	{ "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
 	{ NULL }
 };