PATCH vmx.c: add printk_ratelimit in vmx_intr_assist

[Ryan Harper <ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

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Add printk_ratelimit check in front of printk.  This prevents spamming
of the message during 32-bit ubuntu 6.06server install.  Previously, it
would hang during the partition formatting stage.

-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253   T/L: 678-9253
ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org

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For some guests (ubuntu6.06-server) on intel machines, vmx_inter_assist spams
a message preventing the guest from making forward progress.  Adding in a
ratelimit check prevents the spamming.

Signed-off-by: Ryan Harper <ryanh-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 548e3a5..1c1ad7f 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -2261,7 +2261,8 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu)
 	if (intr_info_field & INTR_INFO_VALID_MASK) {
 		if (idtv_info_field & INTR_INFO_VALID_MASK) {
 			/* TODO: fault when IDT_Vectoring */
-			printk(KERN_ERR "Fault when IDT_Vectoring\n");
+			if (printk_ratelimit())
+				printk(KERN_ERR "Fault when IDT_Vectoring\n");
 		}
 		if (has_ext_irq)
 			enable_irq_window(vcpu);

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