Commit 7a73c028 authored by Avi Kivity's avatar Avi Kivity
Browse files

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: default avatarAvi Kivity <avi@redhat.com>
parent 6aa0b9de

arch/x86/kvm/x86.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -1562,7 +1562,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, 




	r = -ENOMEM;

	r = -ENOMEM;

	size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;

	size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;

	entries = vmalloc(size);

	entries = kmalloc(size, GFP_KERNEL);

	if (!entries)

	if (!entries)

		goto out;

		goto out;
@@ -1581,7 +1581,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, 
	r = n;

	r = n;





out_free:

out_free:

	vfree(entries);

	kfree(entries);

out:

out:

	return r;

	return r;

}

}