Genkernel with virtio drivers06.04.2017 by Dirk Olmes
A colleague asked me to help analyze problems migrating a Gentoo guest VM from a Xen Server based host to a Proxmox (KVM based) host. The Gentoo VM would not boot beyond the initramfs - it just died saying that the root device could not be found.
Since the VM itself boots, Grub is fine. So I figured it must be a problem with the contents of the initramfs. I made sure that the virtio drivers were properly configured into the kernel - as modules.
In the end I did not try the approach that is suggested in the reddit. I rather compiled all virtio drivers directly into the kernel. Easier to maintain, less fiddling with genkernel. Life’s good again.
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