Messages in this thread | | | Date | Mon, 29 Apr 2002 11:13:02 +0200 (MEST) | From | Pozsar Balazs <> | Subject | Re: initrd and devfs |
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I'm not absolutely sure that this is what you want, but I think I have a similar case. I boot from a CD a kernel which has cdrom support compiled as modules, and devfs compiled in:
syslinux starts kernel with this: /boot/bzImage devfs=mount root=/dev/cdroms/cdrom0 initrd=/boot/initrd
Then the initrd loads the needed modules, and _exits_. The kernel then mounts the given root, and the system boots successfully.
So all I needed to do is give the root partition as a parameter, and no mkrootdev or pivot_root was needed.
-- Balazs Pozsar
On Mon, 29 Apr 2002, Keith Owens wrote:
> I am having problems with the combination of initrd and devfs. > > mkinitrd 3.3.9, hacked to build an ia64 initrd on ia32. > Kernel 2.4.18-ia64-020410, config extract. > > CONFIG_DEVFS_FS=y > CONFIG_DEVFS_MOUNT=y > CONFIG_BLK_DEV_RAM=y > CONFIG_BLK_DEV_RAM_SIZE=8192 > CONFIG_BLK_DEV_INITRD=y > > linuxrc commands: > > insmod /lib/qla1280.o > echo Mounting /proc filesystem > mount -t proc /proc /proc > echo Creating root device > mkrootdev /dev/root > fails "mkrootdev: mknod failed: 17". devfs has already created > /dev/root as a symlink. > echo 0x0100 > /proc/sys/kernel/real-root-dev > echo Mounting root filesystem > mount --ro -t ext2 /dev/root /sysroot > fails "mount: error 16 mounting ext2" because /dev/root is wrong. > pivot_root /sysroot /sysroot/initrd > fails "pivotroot: pivot_root(/sysroot,/sysroot/initrd) failed: 2" > > By removing /dev/root immediately before mkrootdev /dev/root I can get > past those errors, even pivot_root works. But then it gets nasty :- > > INIT: version 2.78 booting > Welcome to Red Hat Linux > Press 'I' to enter interactive startup. > Mounting proc filesystem: [ OK ] > Unmounting initrd: umount: /initrd: device is busy > Because of this mount - none /initrd/dev devfs rw 0 0 > > If I boot with initrd and devfs=nomount it goes through initrd > processing and successfully umounts initrd, but then fails "Remounting > root filesystem in read-write mode: mount: no such partition found". > /proc/mounts contains > > /dev/root / ext2 ro 0 0 > > What is the correct way of using initrd and devfs together? > > devfsd.conf is not the answer, initrd does not run the devfsd daemon.
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