Pci passthrough - iommu

[longlegg]

Hi, evaluates Proxmox but having some issue with passthrough devices.
I have followed below instructions but once enabled the machine gets really slow. Webpage stops responding, can show login promt if not timed out, SSH barely works. Local login on machine works but is very slow. KVM uses 100%
https://pve.proxmox.com/wiki/Pci_passthrough
VT-d enabled in bios.

Once settings are restored and grub updated Proxmox are fast again.

Hardware.
i3-7350K on a Gigabyte H270N-WIFI motherboard

Any suggestions?

 

[dcsapak]

hi,

please check out the reference documentation https://pve.proxmox.com/wiki/PCI(e)_Passthrough

also what exactly did you change?
can you post the syslog/journal from a boot with it enabled?