NVIDIA vgpu mdev/mediated devices are getting deleted/removed after VM shutdown with ovirt

Hi Team, NVIDIA vgpu mdev/mediated devices are getting deleted/removed after VM shutdown with ovirt. How I can make them persistent even after VM shutdown/poweroff ? I want to set some vgpu parameter in file /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params for testing to mdev. But can't do as uuid of mdev are not persistent. mdev are not there in /sys/bus/mdev/devices/ after VM shutdown. We were using RHV/Red Hat Virtualization Host 4.4.10 host with NVIDIA vGPU. virsh commands are helping. Can you please help?

On Tue, Apr 19, 2022 at 3:47 PM sandipt--- via Users <users@ovirt.org> wrote:
Hi Team, NVIDIA vgpu mdev/mediated devices are getting deleted/removed after VM shutdown with ovirt. How I can make them persistent even after VM shutdown/poweroff ? I want to set some vgpu parameter in file /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params for testing to mdev. But can't do as uuid of mdev are not persistent. mdev are not there in /sys/bus/mdev/devices/ after VM shutdown. We were using RHV/Red Hat Virtualization Host 4.4.10 host with NVIDIA vGPU. virsh commands are helping. Can you please help?
As from oVirt 4.5, you can set such parameters via oVirt's UI/API, see: https://bugzilla.redhat.com/1987121 (The mdev devices were also changed to managed devices in order to have them persisted)
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Thanks Arik for reply. I want to add enable_large_sys_mem=1 vGPU plugin parameter . How can I do that with oVirt? Could you please share steps? -----Original Message----- From: Arik Hadas <ahadas@redhat.com> Sent: Tuesday, April 19, 2022 6:49 PM To: Sandip Thorat <sandipt@nvidia.com> Cc: users <users@ovirt.org> Subject: Re: [ovirt-users] NVIDIA vgpu mdev/mediated devices are getting deleted/removed after VM shutdown with ovirt External email: Use caution opening links or attachments On Tue, Apr 19, 2022 at 3:47 PM sandipt--- via Users <users@ovirt.org<mailto:users@ovirt.org>> wrote:
Hi Team,
NVIDIA vgpu mdev/mediated devices are getting deleted/removed after VM shutdown with ovirt. How I can make them persistent even after VM shutdown/poweroff ? I want to set some vgpu parameter in file /sys/bus/mdev/devices/vgpu-id/nvidia/vgpu_params for testing to mdev. But can't do as uuid of mdev are not persistent. mdev are not there in /sys/bus/mdev/devices/ after VM shutdown. We were using RHV/Red Hat Virtualization Host 4.4.10 host with NVIDIA vGPU. virsh commands are helping. Can you please help?
As from oVirt 4.5, you can set such parameters via oVirt's UI/API, see: https://bugzilla.redhat.com/1987121 (The mdev devices were also changed to managed devices in order to have them persisted)
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participants (3)
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Arik Hadas
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Sandip Thorat
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sandipt@nvidia.com