| 1 |
On Fri, Jul 19, 2019 at 12:37 PM Ian Zimmerman <itz@××××××××××××.org> wrote: |
| 2 |
> |
| 3 |
> On 2019-07-19 20:58, Adam Carter wrote: |
| 4 |
> |
| 5 |
> > I experimented found the following worked in /etc/default/grub; |
| 6 |
> > |
| 7 |
> > GRUB_DEVICE="PARTUUID=d3554d49-02" |
| 8 |
> > |
| 9 |
> > Which writes grub.cfg as; |
| 10 |
> > linux /vmlinuz-5.2.0-gentoo root=PARTUUID=d3554d49-02 ro |
| 11 |
> > init=/usr/lib/systemd/systemd iommu=pt raid=noautodetect |
| 12 |
> > |
| 13 |
> > PARTUUID looked up with blkid. No initramfs required :) |
| 14 |
> |
| 15 |
> I don't get this. blkid is userspace. The _kernel_ needs to know what |
| 16 |
> the root fs device is, before it even starts pid 1. |
| 17 |
|
| 18 |
The kernel init code is able to find a device given its PARTUUID. |
| 19 |
|
| 20 |
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/init/do_mounts.c?h=v4.19.59#n172 |
Archives