I have been struggling to bring up a MIPS 32 board with busybox with or without initramfs. The kernel stucks there without the shell coming up. [ 1.153000] nf_conntrack version 0.5.0 (1024 buckets, 4096 max) [ 1.161000] ip_tables: (C) 2000-2006 Netfilter Core Team [ 1.167000] TCP cubic registered [ 1.170000] NET: Registered protocol family 17 [ 25.971000] Freeing unused kernel memory: 1032k freed [ 39.969000] Algorithmics/MIPS FPU Emulator v1.5 What I tried here is to use initramfs with statically linked busybox. The initramfs seems to be up, and runs the commands in the /init one by one, and then it goes to a inifite loop in r4k_wait at arch/mips/kernel/genex.S. The following is the execution sequense when it runs /init. Can anyone give me some idea what is wrong? Thanks, Andrew Breakpoint 2, do_execve (filename=0x9780a000 "/bin/sh", argv=0x4f73a4, envp=0x4f73ac, regs=0x97997f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/sbin/switch_root", argv=0x4f7450, envp=0x4f7464, regs=0x97819f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/usr/sbin/switch_root", argv=0x4f7450, envp=0x4f7464, regs=0x97819f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/bin/switch_root", argv=0x4f7450, envp=0x4f7464, regs=0x97819f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. Breakpoint 2, do_execve (filename=0x9780a000 "/usr/bin/switch_root", argv=0x4f7450, envp=0x4f7464, regs=0x97819f30) at fs/exec.c:1293 1293 retval = unshare_files(&displaced); (gdb) c Continuing. ^C Program received signal SIGSTOP, Stopped (signal). r4k_wait () at arch/mips/kernel/genex.S:147 147 jr ra -- And here is the content of /init script - #!/bin/busybox sh # Mount the /proc and /sys filesystems. mount -t proc none /proc mount -t sysfs none /sys mdev -s /bin/sh # Do your stuff here. echo "This script mounts rootfs and boots it up, nothing more!" # Mount the root filesystem. mount -o ro /dev/mtdblock4 /mnt/root # Clean up. umount /proc umount /sys # Boot the real thing. exec switch_root /mnt/root /sbin/init
