As I flashed the "uImage-beta"and "rootfstype-beta.jffs2" into the board step by step followed by 1008573A_MPC8360_U-Boot_Labs.pdf,and then boot up:

U-Boot 1.1.3 R6 (Oct 2 2007 - 16:13:46) MPC83XX

Clock configuration:
Coherent System Bus: 330 MHz
Core: 660 MHz
QE: 495 MHz
Local Bus Controller: 330 MHz
Local Bus: 41 MHz
DDR: 330 MHz
DDR Secondary: 330 MHz
SEC: 110 MHz
I2C1: 330 MHz
I2C2: 330 MHz
CPU: MPC8360E, Rev: 21 at 660 MHz
RCW: 0xA0600004 0x0A04008F
Board: Freescale MPC8360 Com Express - Pilot
I2C: ready
DRAM: DDR 256 MB
FLASH: 8 MB
Read production data: done
Part Number: 1008746
Model Name : COMMPC8360E-10-2752FCR
Model Rev : A
Serial # : 5007M03738
board_get_nth_enetaddr:1093 which 1 1:d8:77
board_get_nth_enetaddr:1093 which 2 1:d8:76
board_get_nth_enetaddr:1093 which 3 1:d8:75
Using external PCI clock
PCI 32bit
In: serial
Out: serial
Err: serial
NAND: 64 MB
Net: FSL GETH0
Hit any key to stop autoboot: 0
## Booting image at ff860000 ...
Image Name: Linux-2.6.11
Image Type: PowerPC Linux Kernel Image (gzip compressed)
Data Size: 1322864 Bytes = 1.3 MB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
Uncompressing Kernel Image ... OK
Linux version 2.6.11 (peter@blackhole) (gcc version 3.4.3) #8 Thu Sep 6 14:17:23 EDT 2007
Built 1 zonelists
Kernel command line: root=/dev/mtdblock4 rootfstype=jffs2 rw console=ttyS0,115200
IPIC (128 IRQ sources, 8 External IRQs) at fe000700
QE IC (64 IRQ sources) at fe100080
PID hash table entries: 2048 (order: 11, 32768 bytes)
Console: colour dummy device 80x25
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 256768k available (2168k kernel code, 552k data, 116k init, 0k highmem)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
scheduling while atomic: swapper/0x00000002/0
Call trace: [c021a41c] [c00041c0] [c029cc38] [c029cb80] [c028e608] [000035fc]
NET: Registered protocol family 16
PCI: Probing PCI hardware
PCI: bridge rsrc 0..ffffff (100), parent c026df80
PCI: bridge rsrc 80000000..9fffffff (200), parent c026df64
SCSI subsystem initialized
usbcore: registered new driver usbfs
usbcore: registered new driver hub
JFFS2 version 2.2. (NAND) (C) 2001-2003 Red Hat, Inc.
Console: switching to colour frame buffer device 80x30
spi_m25p40 version 1.0 init
register char dev with major 254
Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabled
ttyS0 at MMIO 0xe0004500 (irq = 9) is a 16550A
ttyS1 at MMIO 0xe0004600 (irq = 10) is a 16550A
pci_register_driver:403 error 0
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered
RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
loop: loaded (max 8 devices)
MPC8360E PB flash device: 800000 at ff800000 Partition number 4
MPC8360E Com Express Flash Map Info: Found 1 x16 devices at 0x0 in 16-bit bank
check_cmd_set:227 type 0x0001
Intel/Sharp Extended Query Table at 0x010A
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
Creating 4 MTD partitions on "MPC8360E Com Express Flash Map Info":
0x00000000-0x00060000 : "u-boot"
0x00060000-0x001c0000 : "Kernel"
0x001c0000-0x007e0000 : "JFFS2"
0x007e0000-0x00800000 : "broken CFI code"
MPC8360E PB flash device initialized
Attempting to connect to MPC83XX Nand via UPM
NAND device: Manufacturer ID: 0x20, Chip ID: 0x76 (ST Micro NAND 64MiB 3,3V 8-bit)
Scanning device for bad blocks
Creating 2 MTD partitions on "NAND 64MiB 3,3V 8-bit":
0x00000000-0x00800000 : "Com Express NAND FS 0"
0x00800000-0x04000000 : "Com Express NAND FS 1"
Connected to MPC86XX Nand via UPM
driver Freescale MPC8360/MPC832x USB Host Driver, Revision: 1.0
config_transceiver: mode 2
fsl-qe-usb fsl-qe-usb0: at 0xfe1006c0,irq 139
fsl-qe-usb fsl-qe-usb0: new USB bus registered, assigned bus number 1
usb usb1: Product: FHCI HOST Controller
usb usb1: Manufacturer: Linux 2.6.11 fsl-qe-usb
usb usb1: SerialNumber: fsl-qe-usb
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
config_transceiver: mode 4
Initializing USB Mass Storage driver...
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
eth0: Running with NAPI enabled
eth1: Running with NAPI enabled
eth2: Running with NAPI enabled
eth3: Running with NAPI enabled
NET: Registered protocol family 2
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP established hash table entries: 16384 (order: 5, 131072 bytes)
TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
TCP: Hash tables configured (established 16384 bind 16384)
NET: Registered protocol family 1
NET: Registered protocol family 17
Empty flash at 0x0069d17c ends at 0x0069d200
VFS: Mounted root (jffs2 filesystem).
Freeing unused kernel memory: 116k init
Setting the hostname to freescale
Mounting filesystems
Setting up networking on loopback device:
Setting up networking on eth0:
udhcpc (v0.9.9-pre) started
udhcpc[784]: udhcpc (v0.9.9-pre) started
eth0: Setting MII master to UCC0
eth0: PHY is Broadcom 5481 (143bca2)
jffs2_get_inode_nodes(): Data CRC failed on node at 0x0069d974: Read 0x82aac52a, calculated 0xf462e0ee
Sending discover...
udhcpc[784]: Sending discover...
Sending discover...
udhcpc[784]: Sending discover...
Sending discover...
udhcpc[784]: Sending discover...
No lease, forking to background.
udhcpc[784]: No lease, forking to background.
Setting up networking on eth1:
udhcpc (v0.9.9-pre) started
udhcpc[798]: udhcpc (v0.9.9-pre) started
eth1: Setting MII master to UCC1
eth1: PHY is Broadcom 5481 (143bca2)
Sending discover...
udhcpc[798]: Sending discover...
Sending discover...
udhcpc[798]: Sending discover...
Sending discover...
udhcpc[798]: Sending discover...
No lease, forking to background.
udhcpc[798]: No lease, forking to background.
Starting inetd:
Starting the dropbear ssh server:


Welcome to Freescale Semiconductor Embedded Linux Environment

!!!!! WARNING !!!!!!!

The default password for the root account is: root
please change this password using the 'passwd' command
and then edit this message (/etc/issue) to remove this message
freescale login: udhcpc[794]: Sending discover...
udhcpc[794]: Sending discover...
udhcpc[794]: Sending discover...
udhcpc[808]: Sending discover...
udhcpc[808]: Sending discover...
udhcpc[808]: Sending discover...



what's the meaning "udhcpc[794] & udhcpc[808]"? DO I have wrong env of uboot?
TKS!