proxmox:troubleshooting:kernel_panic
Table of Contents
Proxmox - Troubleshooting - Kernel Panic
Proxmox freezing with Kernel Panic.
This Kernel Panic seems to coincide with IO load.
Possible Solution
Navigate to the specific VM causing the issue.
- Select the Hardware menu.
- Select the Harddisk.
- Changing cache from No cache to Write back
- Select Memory menu.
- Uncheck Ballooning device.
NOTE: As the Kernel Panic seems to coincide with IO load, another option is to try disabling io_uring.
- With “cache=writeback” that is already the case, so it would seem to be a candidate of something that clearly changed in PVE 7.0.
- To test, edit the VM config in /etc/pve/qemu-server/<vmid>.conf:
- Add ,aio=native to the end of your disks (i.e. scsi0, sata0, etc…).
- Verify by making sure qm showcmd 100 --pretty | grep io_uring does not show anything.
Solution - Install the latest amd64_microcode
Edit /etc/apt/sources.list, and add in
- /etc/apt/sources.list
deb http://ftp.de.debian.org/debian bullseye main non-free
Install the AMD Microcode:
apt update
apt install amd64-microcode
Reboot.
References
proxmox/troubleshooting/kernel_panic.txt · Last modified: 2021/07/24 18:08 by peter