how to configure virtio to use MSI? I didn't found out it.
thanks.
2010/11/9 Gleb Natapov <gleb@xxxxxxxxxx>:
> On Tue, Nov 09, 2010 at 03:37:44PM +0800, lidong chen wrote:
>> sorry,i take mistake,
>>
>> the ept violation is not caused by 2M hugepages, but caused by e1000
>> emulated by qemu.
>> I test uesd 2M hugepages and virio, the performance is better than
>> e1000. but is still worse than xen. I will continue to find out other
>> reason.
>>
>>
>>
>> so, there are two question:
>> 1.why have so many ept violation when used e1000?
>>
>>
>> 2.when used virtio, there ara also such error happen.is this normal?
>> I add the printk in function tdp_page_fault below.
>> pfn = gfn_to_pfn(vcpu->kvm, gfn);
>> if (is_error_pfn(pfn)) {
>> kvm_release_pfn_clean(pfn);
>> if( printk_ratelimit() ) {
>> printk(KERN_EMERG "error gpa is %ld\n", gpa);
>> }
>> return is_fault_pfn(pfn) ? -EFAULT : 1;
>> }
>>
>> and result is:
>> [root@rhel6-kvm1 ~]# dmesg -c
>> __ratelimit: 387 callbacks suppressed
>> error gpa is 4273995776
>> error gpa is 4273995776
>> error gpa is 4273995776
>> error gpa is 4273995776
>> error gpa is 4273995776
>>
> You should really print this in hex :) This is 0xfec00000 AKA
> IOAPIC. Try to configure virtio to use MSI.
>
> --
> Gleb.
>
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
