Hi All, I am porting Linux. I desire the system to start up in the flowing steps: 1. Kernel mount rootfs from initrd. 2. Install the NTFL drivers. 3. Mount the real filesystem which resides in NAND flash and change root from initrd to nand. 4. Umount initrd to reclaim system memory.
All seem okay except step 4. Here is my linuxrc script: ===================================================================== #!/bin/sh mkdir /sysroot mkdir /sysroot/dev mknod /sysroot/dev/console c 5 1 mknod /sysroot/dev/null c 1 3 mknod /sysroot/dev/nftla b 93 0 mknod /sysroot/dev/nftla1 b 93 1 cd sysroot exec <dev/console >dev/console 2>&1 insmod /lib/modules/2.6.27.29/nftl.ko mount -t ext2 dev/nftla1 . cd /sysroot pivot_root . old_root umount -n /old_root exec chroot . /sbin/init ===================================================================== I got an error as: can't umount /old_root: Device or resource busy The kernel command line is mem=32M rd_start=0x80800000 rd_size=8M root=/dev/ram0 rw console=ttyS1,115200n8 init=/linuxrc And `mount' shows: rootfs on / type rootfs (rw) /dev/root on /old_root type ext2 (rw,errors=continue) dev/nftla1 on / type ext2 (rw,errors=continue) none on /proc type proc (rw) What is wrong? PRC Oct 30,2009 _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
