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| author |   Avi Kivity <avi@qumranet.com> | 2007-11-20 23:01:14 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 17:53:10 +0200 |
| commit | 0f74a24c59b814c1c8085251cbea48d339f0c7c6 (patch) | |
| tree | 1102e9835f247b7c9d05887f36e2f8fa3b20681a | |
| parent | KVM: MMU: Implement guest page fault bypass for nonpae (diff) | |
| download | linux-dev-0f74a24c59b814c1c8085251cbea48d339f0c7c6.tar.xz linux-dev-0f74a24c59b814c1c8085251cbea48d339f0c7c6.zip | |
KVM: Add statistic for remote tlb flushes
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/kvm.h | 1 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 3 | ||||
| -rw-r--r-- | 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 b65f5dee4b1b..048849d97b35 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 7939b5c9a4b4..aec6b67cfebb 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 b482b6a8a828..ac09f381f47f 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 } }; |