Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0f74a24c59b814c1c8085251cbea48d339f0c7c6
Commit:     0f74a24c59b814c1c8085251cbea48d339f0c7c6
Parent:     e5a4c8cad952d6e060991841f3632578ab3ae133
Author:     Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Tue Nov 20 23:01:14 2007 +0200
Committer:  Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 17:53:10 2008 +0200

    KVM: Add statistic for remote tlb flushes
    
    Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
 drivers/kvm/kvm.h      |    1 +
 drivers/kvm/kvm_main.c |    3 +++
 drivers/kvm/x86.c      |    1 +
 3 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b65f5de..048849d 100644
--- a/drivers/kvm/kvm.h
+++ b/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/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 7939b5c..aec6b67 100644
--- a/drivers/kvm/kvm_main.c
+++ b/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/drivers/kvm/x86.c b/drivers/kvm/x86.c
index b482b6a..ac09f38 100644
--- a/drivers/kvm/x86.c
+++ b/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 }
 };
 
-
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