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comparison content/Linux/genkernel-vs-virtio.md @ 84:8b5501bb7973
add blog post about genkernel
| author | Dirk Olmes <dirk@xanthippe.ping.de> |
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| date | Thu, 06 Apr 2017 09:23:21 +0200 |
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| 83:0f9fffa05db1 | 84:8b5501bb7973 |
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| 1 Title: Genkernel with virtio drivers | |
| 2 Date: 2017-04-06 | |
| 3 Lang: en | |
| 4 Tags: Gentoo | |
| 5 | |
| 6 A colleague asked me to help analyze problems migrating a [Gentoo](http://www.gentoo.org) guest VM from a [Xen Server](https://xenserver.org) based host to a [Proxmox](https://www.proxmox.com) (KVM based) host. The Gentoo VM would not boot beyond the initramfs - it just died saying that the root device could not be found. | |
| 7 | |
| 8 Since the VM itself boots, [Grub](https://en.wikipedia.org/wiki/GNU_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. | |
| 9 | |
| 10 After a lot of poking around I found [a reddit](https://www.reddit.com/r/Gentoo/comments/25fkvk/gentoo_guest_on_virtio_kvm_how_to_initramfs_via/) that mentions [genkernel](https://wiki.gentoo.org/wiki/Genkernel). I was not aware that genkernel is picky about the modules that are included into the initramfs. | |
| 11 | |
| 12 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. |