On Thu, Mar 26, 2020 at 6:50 PM Douglas R. Reno <ren...@linuxfromscratch.org>
wrote:
>
> On 3/26/20 5:43 PM, Jason Gauthier wrote:
>
>
>
> On Thu, Mar 26, 2020 at 5:51 PM Douglas R. Reno <
> ren...@linuxfromscratch.org> wrote:
>
>>
>> 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
>>
>>
>>
> Thank you! The trick was that NONE of this stuff was enabled by default,
> and most of it should not be set to 'm'. I got the system booted!
> Now, there isn't any network, but at least I've booted my first LFS. This
> was fun, but I'm using this as a platform to help me build software for yet
> another platform.
>
> There is a VIRTIO network adapter too:
>
> VIRTIO_NET=y
>
> See if that helps :)
>
>
> Even easier fix. My debian VM's NICs are all "ens0", so I build LFS like
that. This one was eth0. Simple fix and reboot. All is well!
Don't care about graphics, output or anything. I just need a build platform.
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