Richard Fish wrote: > Is this an initrd or initramfs (aka, cpio.gz) image? > > If it is initrd, you should have a /linuxrc script to initialize the > system. For grub, you will need: > > kernel /vmlinuz root=/dev/ram0 init=/linuxrc > initrd=/rootfs.gz > > Then your linuxrc script must *not* exit. It will probably need to > call /sbin/init with something like: > > exec /sbin/init $@ > > In your case, /linuxrc probably doesn't need to do much of anything else. > > > If it is initrams, then you just need to create a /init script and > place the same "exec /sbin/init..." inside it. You do not need the > init= option for the kernel in the grub configuration. > > For some more info, take a look at > /usr/src/linux/Documentation/early-userspace/README > > HTH > > -Richard > > Ognjen Bezanov wrote: > >> Hi all, >> >> Im building an x86 embedded distro using gentoo. Now i have been rather >> successful. I have built the whole system and it works, while only >> taking up 9mb (when gzipped). >> >> Now my question is how to get linux to load the gzipped image file into >> a ramdisk and use it as a root filesystem. >> >> Running the system directly from the CF card works great, but when >> trying to get it to run it in ram it fails >> with "kernel panic: VFS: Unable to mount root fs on unknown-block(1,0)". >> >> My attempt at running the system from ram is as follows: >> >> (grub config file): >> >> kernel /vmlinuz initrd=/rootfs.gz root=/dev/ram0 >> >> the rootfs.gz file is ~10Mb, and when uncompressed is an 100mb image >> (most of the image is free space to >> allow for future additions, this is a test bed). >> >> >> Now I presume this is probably what is incorrect, in which case can >> anyone help me regarding how to use >> ramdisks as root devices. (googling about tells me that the initrd image >> is not the root image, but rather >> a pre-root mounting fs to prepare the system for booting). >> >> P.S Please CC me as this mailinglist doesnt play nice with my email >> account. thanks! >> >> >> > Thanks, that was helpful. Now the system finds the root fs and loads it. But the system still wont boot. It tells me "RAMDISK: Compressed image found at block 0" as a final kernel message, then just sits there (for ages). At lease its closer to functioning then before, but there are a few bugs to iron out.
What could be wrong? Thanks in advance -- gentoo-user@gentoo.org mailing list
