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>

1 files changed, 3 insertions, 4 deletions

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 0446c5a39ae2..6758ec80f902 100644
--- 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);