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KVM: Keep an upper bound of initialized vcpus 

That way, we don't need to loop for KVM_MAX_VCPUS for a single vcpu
vm.

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-06-07 19:11:53 +03:00
parent 72d6e5a08a
commit 39c3b86e5c
2 changed files with 6 additions and 0 deletions
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1
drivers/kvm/kvm.h
View File

@ -379,6 +379,7 @@ struct kvm {
struct list_head active_mmu_pages; struct list_head active_mmu_pages;
int n_free_mmu_pages; int n_free_mmu_pages;
struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
int nvcpus;
struct kvm_vcpu vcpus[KVM_MAX_VCPUS]; struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
int memory_config_version; int memory_config_version;
int busy; int busy;

5
drivers/kvm/kvm_main.c
View File

@ -2391,6 +2391,11 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
if (r < 0) if (r < 0)
goto out_free_vcpus; goto out_free_vcpus;
spin_lock(&kvm_lock);
if (n >= kvm->nvcpus)
kvm->nvcpus = n + 1;
spin_unlock(&kvm_lock);
return r; return r;
out_free_vcpus: out_free_vcpus: