I thought if root= is not set to /dev/ram0 the kernel doesn't use the initramfs as "first" root.
The server is on a remote location so i can't see if it correctly starts
the /linuxrc in the initramfs.
The server boots without problems, i just wanted to check if root=
shouldn't be set to root=/dev/ram0, so that my initramfs will be used.
Here is the interesting part on my machine:
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class
gnu --class os $menuentry_id_option 'gnulinux-simple-f14c5701-d
305-4bd7-9655-f20f5877a5aa' {
load_video
insmod gzio
insmod part_gpt
insmod part_gpt
insmod diskfilter
insmod mdraid1x
insmod ext2
set root='mduuid/4aff33622e32377381237e3004a4b8bc'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root
--hint='mduuid/4aff33622e32377381237e3004a4b8bc'
71d9e42f-84b7-4e16-bd07-b88d09c4f
513
else
search --no-floppy --fs-uuid --set=root
71d9e42f-84b7-4e16-bd07-b88d09c4f513
fi
echo 'Loading Linux x86_64-3.2.11-hardened_20120601-1 ...'
linux /kernel-genkernel-x86_64-3.2.11-hardened_20120601-1
root=UUID=f14c5701-d305-4bd7-9655-f20f5877a5aa ro dolvm domdadm r
eal_root=UUID=f14c5701-d305-4bd7-9655-f20f5877a5aa
echo 'Loading initial ramdisk ...'
initrd /initramfs-genkernel-x86_64-3.2.11-hardened_20120601-1
}
Thanks for your answers!
Am 04.06.2012 21:50, schrieb Michael Hampicke:
>
>
> Am 04.06.2012 21:10, schrieb Paul Hartman:
>> On Mon, Jun 4, 2012 at 1:40 PM, morlix <mor...@morlix.de> wrote:
>>> Hello,
>>>
>>> does anybody of you know how to get the grub2-mkconfig script to
>>> correctly detect initramfs and set the kernel parameter "root=" to
>>> /dev/ram0 or just don't set the parameter at all.
>>>
>>> I'm using genkernel and want to use my generated initramfs, but
>>> everytime grub2-mkconfig gets called it sets the kernel parameter root=
>>> to my root partition and then the initramfs won't get used.
>>>
>>> I think manually editing /boot/grub2/grub.cfg and deleting the root=
>>> parameter and setting real_root isn't a good choice for long term.
>>
>> The default scripts for grub2-mkconfig looks for a specific filename
>> for the initramfs, related to the kernel filename. If you look in
>> those scripts, you may be able to modify it to look at your filenames
>> instead.
>
> Paul is right, but you shouldn't need to modify anything. Here's what
> grub2-mkconfig generates on my machine (first entry only):
>
>
> menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class
> gnu --class os $menuentry_id_option
> 'gnulinux-simple-713f1c17-1b9a-4967-ac05-d6a6a9ff60a5' {
> load_video
> set gfxpayload=keep
> insmod gzio
> insmod part_gpt
> insmod ext2
> set root='hd0,gpt2'
> if [ x$feature_platform_search_hint = xy ]; then
> search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2
> --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2
> e39917c2-b59e-4447-bcae-39a41c3816a7
> else
> search --no-floppy --fs-uuid --set=root
> e39917c2-b59e-4447-bcae-39a41c3816a7
> fi
> echo 'Loading Linux x86_64-3.3.5-gentoo ...'
> linux /kernel-genkernel-x86_64-3.3.5-gentoo
> root=UUID=713f1c17-1b9a-4967-ac05-d6a6a9ff60a5 ro
> echo 'Loading initial ramdisk ...'
> initrd /initramfs-genkernel-x86_64-3.3.5-gentoo
> }
>
>
> And here are the file in /boot
> # find /boot/ -name "*genkernel*"
> /boot/kernel-genkernel-x86_64-3.3.5-gentoo
> /boot/System.map-genkernel-x86_64-3.3.5-gentoo
> /boot/initramfs-genkernel-x86_64-3.3.5-gentoo
> /boot/kernel-genkernel-x86_64-3.3.5-gentoo.old
> /boot/System.map-genkernel-x86_64-3.3.5-gentoo.old
> /boot/initramfs-genkernel-x86_64-3.3.5-gentoo.old
>
> It boots perfectly fine using my initramfs
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