On Tue, May 29, 2007 at 06:30:31PM +0200, Ferenc Wagner wrote:
> Ezt hogyan lehet ellenorizni?
/usr/src/linux/Documentation/filesystems/ramfs-rootfs-initramfs.txt:
All this differs from the old initrd in several ways:
[...]
- When switching another root device, initrd would pivot_root and then
umount the ramdisk. But initramfs is rootfs: you can neither pivot_root
rootfs, nor unmount it. Instead delete everything out of rootfs to
free up the space (find -xdev / -exec rm '{}' ';'), overmount rootfs
with the new root (cd /newmount; mount --move . /; chroot .), attach
stdin/stdout/stderr to the new /dev/console, and exec the new init.
Since this is a remarkably persnickity process (and involves deleting
commands before you can run them), the klibc package introduced a helper
program (utils/run_init.c) to do all this for you. Most other packages
(such as busybox) have named this command "switch_root".
Szvsz egy ures ramfs 1-2 kB-nal tobbet nem foglal.
Gabor
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MTA SZTAKI Computer and Automation Research Institute
Hungarian Academy of Sciences
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