On 3/26/20 3:03 PM, Jason Gauthier wrote:
I'm to the point where grub needs to be installed.
I've built LFS on a loopback device, so there isn't a physical drive
to install grub to.
I booted a debian recovery disk, and I installed and configured grub.
Since I'm going to use this on a QEMU system I set the linux parameter to
"linux /boot/vmlinuz-5.5.3-lfs-9.1 root=/dev/vda1 ro"
Grub loads, and boots the kernel. But the kernel halts because it
cannot find the root filesystem. Specifically, it says, "Please
append a correct "root=" boot option; here are the available partitions:
But there aren't any partitions listed.
My grub.cfg:
set default=0
set timeout=5
insmod ext2
set root=(hd0,1)
menuentry "GNU/Linux, Linux 5.5.3-lfs-9.1" {
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=/dev/vda1 ro
}
Appreciate any pointers. I "feel" like the kernel might not know
about the disk subsystem, but I didn't deviate from
compilation options, and I've been out of the kernel compilation game
for a long time so I don't know what's even defaulted or modular anymore.
Hi Jason,
I've had something similar happen before. I presume because you're
mentioning vda1 that you're using VirtIO disks? I have one system that
uses those - it's a VM inside of a Proxmox instance far far away from me
(which I rarely ever use now). Proxmox uses libvirt with Qemu IIRC.
You'll want to ensure that the following options are built into your kernel:
SCSI_VIRTIO=y
VIRTIO_BLK=y
VIRTIO_BLK_SCSI=y
VIRTIO=y
The crypto and GPU drivers are rather important too if you're not going
to be using the Qemu defaults, but focus on getting your system booting
before worrying about those.
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