KVM: Use kmalloc() instead of vmalloc() for KVM_[GS]ET_MSR

We don't need more than a page, and vmalloc() is slower (much
slower recently due to a regression).

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 05d571f6f19615cab8a90dec413e0a39537e914a..7fa89c39c64f67df0a62804cfa242ae6a2d6f638 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1562,7 +1562,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
 
        r = -ENOMEM;
        size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
-       entries = vmalloc(size);
+       entries = kmalloc(size, GFP_KERNEL);
        if (!entries)
                goto out;
 
@@ -1581,7 +1581,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
        r = n;
 
 out_free:
-       vfree(entries);
+       kfree(entries);
 out:
        return r;
 }