mpc823 scc2 as eth0, nfs slow with linuxppc-2.4.25, but ok with linuxppc-2.4.4, why?

["debora" <deboralh@fel.com.cn>]

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Hello All,

My board uses a MPC823 and SCC2 as its ethernet interface.

display "nfs: server 192.168.0.82 not responding, still trying"
        "nfs: server 192.168.0.82 OK"
when boot with linux-2.4.25, but ok with linux-2.4.4

Below is what it looks like when booting.


boot with linux-2.4.25:
eth0: CPM ENET Version 0.2 on SCC2, 42:dd:0c:46:e8:b8
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 4096)
IP-Config: Complete:
      device=eth0, addr=192.168.0.182, mask=255.255.255.0, gw=192.168.0.1,
     host=192.168.0.182, domain=, nis-domain=(none),
     bootserver=192.168.0.82, rootserver=192.168.0.82, rootpath=
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
Looking up port of RPC 100003/2 on 192.168.0.82
Looking up port of RPC 100005/1 on 192.168.0.82
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 52k init
nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 OK
nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 OK
nfs: server 192.168.0.82 OK
                Welcome to Sinovee Linux 2.0 (Overlord)
                Press 'I' to enter interactive startup.
Mounting proc filesystem:  nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 OK
[  OK  ]
Configuring kernel parameters:  [  OK  ]
Setting clock (utc): Wed Jun 22 17:36:00 CST 2005 [  OK  ]
Activating swap partitions:  [  OK  ]
Setting hostname 192.168.0.182:  [  OK  ]
Starting watchdog: [OK]
Watchdog daemon ver 0.1, (c) 2002, FEL co. ltd.
watchdog: No such device
INIT: Entering runlevel: 3
Entering non-interactive startup
Starting xinetd: nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 OK
[  OK  ]

Sinovee Linux 2.0 (Overlord)
Kernel 2.4.4 on an MPC8xx
192 login: root
nfs: server 192.168.0.82 not responding, still trying
nfs: server 192.168.0.82 OK
sh-2.04#
sh-2.04#

boot with linux-2.4.4:
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
Kernel command line: root=/dev/nfs rw console=ttyS0,19200 nfsroot=192.168.0.82:/
prj/sc8xx/root ip=192.168.0.182:192.168.0.82:192.168.0.1:255.255.255.0::eth0:off
Decrementer Frequency: 4687500
Calibrating delay loop... 74.75 BogoMIPS
Memory: 30744k available (1004k kernel code, 376k data, 48k init, 0k highmem)
Dentry-cache hash table entries: 4096 (order: 3, 32768 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 2048 (order: 2, 16384 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Starting kswapd v1.8
CPM UART driver version 0.03
ttyS0 on SMC1 at 0x0280, BRG1
ttyS1 on SMC2 at 0x0380, BRG2
pty: 256 Unix98 ptys configured
WDT_8xx: SWT not enabled by firmware, SYPCR=0xffffff88
block: queued sectors max/low 20357kB/6785kB, 64 slots per queue
RAMDISK driver initialized: 16 RAM disks of 6144K size 1024 blocksize
eth0: CPM ENET Version 0.21 on SCC2, 42:dd:0c:46:e8:b8
loop: loaded (max 8 devices)
Using configured DiskOnChip probe address 0x80000000
DiskOnChip 2000 found at address 0x80000000
Flash chip found: Manufacturer ID: 98, Chip ID: 75 (Toshiba TC58256FT/DC)
1 flash chips found. Total DiskOnChip size: 32 MiB
NFTL driver: nftlcore.c $Revision: 1.83 $, nftlmount.c $Revision: 1.23 $
Cannot calculate an NFTL geometry to match size of 0xf760.
Using C:989 H:16 S:4 (== 0xf740 sects)
Partition check:
 nftla: nftla1
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 2048)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
Looking up port of RPC 100003/2 on 192.168.0.82
Looking up port of RPC 100005/2 on 192.168.0.82
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 48k init
INIT: version 2.78 booting
                Welcome to Sinovee Linux 2.0 (Overlord)
               Press 'I' to enter interactive startup.
Mounting proc filesystem:  [  OK  ]
Configuring kernel parameters:  [  OK  ]
Setting clock (utc): Fri Jun 24 02:00:28 CST 2005 [  OK  ]
Activating swap partitions:  [  OK  ]
Setting hostname 192.168.0.182:  [  OK  ]
Starting watchdog: Watchdog daemon ver 0.1, (c) 2002, FEL co. ltd.
watchdog: No such device
[OK]
INIT: Entering runlevel: 3
Entering non-interactive startup
Starting xinetd: [  OK  ]

Sinovee Linux 2.0 (Overlord)
Kernel 2.4.4 on an MPC8xx

192 login:



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