KVM: PPC: Allocate vcpu struct using vmalloc

We used to use get_free_pages to allocate our vcpu struct. Unfortunately
that call failed on me several times after my machine had a big enough
uptime, as memory became too fragmented by then.

Fortunately, we don't need it to be page aligned any more! We can just
vmalloc it and everything's great.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 0446c5a..6758ec8 100644 (file)
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -1112,8 +1112,7 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
        struct kvm_vcpu *vcpu;
        int err;
 
-       vcpu_book3s = (struct kvmppc_vcpu_book3s *)__get_free_pages( GFP_KERNEL | __GFP_ZERO,
-                       get_order(sizeof(struct kvmppc_vcpu_book3s)));
+       vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
        if (!vcpu_book3s) {
                err = -ENOMEM;
                goto out;
@@ -1151,7 +1150,7 @@ struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
        return vcpu;
 
 free_vcpu:
-       free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
+       vfree(vcpu_book3s);
 out:
        return ERR_PTR(err);
 }
@@ -1162,7 +1161,7 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 
        __destroy_context(vcpu_book3s->context_id);
        kvm_vcpu_uninit(vcpu);
-       free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
+       vfree(vcpu_book3s);
 }
 
 extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);