[ovirt-users] PCI Passthrough problem

[Martin Polednik]

On 07/06/16 16:50 +0200, Jérôme Chapelle wrote:
>We are no more able to give a pci device to one VM.
>Here is the process we used to assign one device to one VM:
>- Click on the VM, and then on the tab "Host devices"
>- In the tab, click on "pin to host" and select the host that will give the pci device
>- Click on "add device", in the window appear all the pci devices: choose the pci card you wish (ex. pci_0000_83_00_0 pci_0000_83_00_1) and then click on the gray arrow to assign this device to the VM
>- Click on ok
>- boot the VM.
>The problem is that in the window that appears, there is not a single pci device listed (there should be many listed).
>I checked first: the IOMMU setting is set in the kernel.
>
>Our environment:
>We have two HV running CentOs7.
>Each of them have three fiber channel cards. First card is connected to a disk array, second one to the first tape library and third one to another tape library.
>We used to give the second card to a VM1, and the third card to another VM2. Both VMs ran on one HV or on the other in the past: everything was fine.
>What happened:
>Today we add to upgrade one of the HV (HV1). Both VMs ran on this HV1. We upgraded then restarted the HV1.
>Then I edited the second VM2 in order to remove card from HV1. Then I tried to add the card from HV2 to this VM2: the list of "host devices" is empty.
>I started the VM1: it works fine (I didn't change anything on it).

Hello!

I'm afraid you have hit the bug [1]. For hosts where you need host
devices, the best solution is most likely not upgrading them to 3.6.6
for now.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1341299

>
>-- 
>
>
>	
>	
>	
>		Jérôme Chapelle
>		C entre I nformatique N ational de l' E nseignement S upérieur
>950 rue de Saint Priest
>34 097 M ONTPELLIER Cedex 5
>
>		Tél. 	04 67 14 14 14
>		eMail 	chapelle at cines.fr
>

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