[ovirt-users] hostdev passthrough

[Martin Polednik]

On 05/12/16 21:12 -0500, Charles Kozler wrote:
>If you're not using SRIOV then what do you need passthrough for? If it's
>for something like connecting a port that is connected to a mirror port on
>a switch then you can bridge it then add the nic to the VM. I've done this
>for security onion and other systems that need a mirror port to get data

The benefits of passthrough are

a) performance,
b) avoiding host stack (e.g. nic could only have guest OS drivers).

If your host is capable of passthrough[1], you can navigate to the VM
tab -> host devices subtab and assign the nic there.

[1] meaning VT-d (or AMD-vi) properly works
https://www.ovirt.org/develop/release-management/features/engine/hostdev-passthrough/

>On Dec 5, 2016 8:48 PM, "qinglong.dong at horebdata.cn" <
>qinglong.dong at horebdata.cn> wrote:
>
>> I have not understood SR-IOV clearly. I just want to pass through the nic
>> of the host to the vm. Is it possible?
>>
>>
>> *From:* Yaniv Dary <ydary at redhat.com>
>> *Date:* 2016-12-01 19:16
>> *To:* qinglong.dong at horebdata.cn
>> *CC:* users <users at ovirt.org>
>> *Subject:* Re: [ovirt-users] hostdev passthrough
>> Are you trying to use SR-IOV or NIC pass-through?
>>
>> Yaniv Dary
>> Technical Product Manager
>> Red Hat Israel Ltd.
>> 34 Jerusalem Road
>> Building A, 4th floor
>> Ra'anana, Israel 4350109
>> Tel : +972 (9) 7692306 <+972%209-769-2306>
>>         8272306
>> Email: ydary at redhat.com
>> IRC : ydary
>>
>>
>> On Thu, Dec 1, 2016 at 3:54 AM, qinglong.dong at horebdata.cn <
>> qinglong.dong at horebdata.cn> wrote:
>>
>>> Hi, all:
>>>         I want to assign a nic of one host to the vm which is running in
>>> the host.
>>>
>>>         When I assign the nic to vm, I got nothing.
>>>
>>>         And I got the event:
>>>         Anyone can help? Thanks!
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>> _______________________________________________
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>>
>>







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