[pve-devel] last training week student feedback/request

Dominik Csapak d.csapak at proxmox.com
Thu Jun 23 10:37:46 CEST 2022

On 6/23/22 10:25, DERUMIER, Alexandre wrote:
> Hi,
> I just finished my proxmox training week,
> here some student requests/feedback:


i just answer the points where i'm currently involved, so someone else
might answer to the other ones ;)

> 2)
> Another student have a need with pci passthrough, cluster with
> multiples nodes with multiple pci cards.
> He's using HA and have 1 or 2 backups nodes with a lot of cards,
> to be able to failover 10 others servers.
> The problem is that on the backups nodes, the pci address of the cards
> are not always the same than production nodes.
> So Ha can't work.
> I think it could be great to add some kind of "shared local device
> pool" at datacenter level, where we could define
> pci:     poolname
>           node1:pciaddress
>           node2:pciaddress
> usb:     poolname
>           node1:usbport
>           node2:usbport
> so we could dynamicaly choose the correct pci address when restarting
> the vm.
> Permissions could be added too, maybe a migratable option when mdev
> live migration support will be ready, ...

i was working on that last year, but got hold up with other stuff,
but i'm planning to picking this up again this/next week

my solution looked very similar to yours, with additional fields
to uniquely identify the card (to prevent accidental pass-through
when the address changes fore example)

permissions are also planned there...

> 3)
> Related to 2), another student have a need of live migraton with nvidia
> card with mdev.
> I'm currently trying to test to see if it's possible, as they are some
> experimental vfio option to enable it, but it doesn't seem to be ready.

would be cool, i'd like to have some vgpu capable cards to test here,
but so far no luck (also access/support to/of the vgpu driver
from nvidia is probably the bigger problem AFAICS)

kind regards

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