Messages in this thread Patch in this message | | | From | Avi Kivity <> | Subject | [PATCH 53/58] KVM: Keep an upper bound of initialized vcpus | Date | Sun, 17 Jun 2007 12:44:34 +0300 |
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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> --- drivers/kvm/kvm.h | 1 + drivers/kvm/kvm_main.c | 5 +++++ 2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index d49b16c..528a56b 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -379,6 +379,7 @@ struct kvm { struct list_head active_mmu_pages; int n_free_mmu_pages; struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; + int nvcpus; struct kvm_vcpu vcpus[KVM_MAX_VCPUS]; int memory_config_version; int busy; diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 5564169..4e1a017 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2391,6 +2391,11 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) if (r < 0) goto out_free_vcpus; + spin_lock(&kvm_lock); + if (n >= kvm->nvcpus) + kvm->nvcpus = n + 1; + spin_unlock(&kvm_lock); + return r; out_free_vcpus: -- 1.5.0.6 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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