I've got occasional Kernel Panic during client's boot up.
The ratio of successful attempts to unsuccessful is about 2:1.
See the console messages below (I type it in manually :-0 ):
Unknown Flash Type
Bootrom v1.4
Etherboot/32 v4.5.8 (GPL) For more info, visit
www.DisklessWorkstations.Com
ROM segment 0xC800 length 0x4000 reloc 0x9800
Etherboot/32 version 4.5.8 (GPL) for [RTL8139]
Found Realtek 8139 at )xC000, ROM address 0x00370000
Probing...[RTL8139] - ioaddr 0xC000, addr 00:50:2C:60:76:C7 10Mbps
full-duplex
Searching for server (DHCP)...
Me: 172.16.11.139, Server: 172.16.1.40, Gateway 172.16.3.254
Loading /lts/vmlinuz-2.4.9-ltsp-5 (NBI)... done
mknbi-1.2-6/first32.c (GPL)
66496k total memory
Ramdisk at 0X0407F000, size 0X00071000
Uncompressing Linux... Ok, booting the kernel.
Linux version 2.4.9-ltsp-5 (root@server) (gcc version 2.96 20000731 (Red
Hat Linux 7.1.2.96-98)) #7 Mon Dec 10 00:59:58 EST 2001
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000010009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000000bf00000 (usable)
BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
On node 0 totalpages: 48896
zone(0): 4096 pages.
zone(1): 44800 pages.
zone(2): 0 pages.
Kernel command line: rw root=/dev/ram0 init=/linuxrc rw
Initializing CPU#0
Detected 534.556 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 1064.96 BogoMIPS
Memory: 190128k/195584k available (867k kernel code, 5068k reserved, 204k
data,
68k init, 0k highmem)
Dentry-cache hash table entries: 32768 (order: 6, 262144 bytes)
Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
Mount-cache hash table entries: 4096 (order: 3, 32768 bytes)
Buffer-cache hash table entries: 8192 (order: 3, 32768 bytes)
Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 128K
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0
CPU: Intel Celeron (Coppermine) stepping 03
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... PK.
Checking for popad bug... OK.
POSIX conformance testing by UNIFIX
PCI: PCI BIOS revision 2.10 entry at 0xfb2c0, last bus=1
PCI: Using configuration type 1
PCI: Probing PCI hardware
Unknown bridge resource 2: assuming transparent
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Starting kswapd v1.8
devfs: v0.107 (20010709) Richard Gooch ([EMAIL PROTECTED])
devfs: boot_options: 0x0
pty: 256 Unix98 ptys configured
block: 128 slots per queue, batch=16
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 1024 buckets, 8Kbytes
TCP: Hash tables configured (established 16384 bind 16384)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0
RAMDISK: Compressed image found at block 0
Freeing initrd memory: 452k freed
VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 68k freed
========================================================================
=======
Running /linuxrc
Mounting /proc
linuxrc: Installing 8139too driver
insmod /lib/modules/net/8139too.o
Using /lib/modules/net/8139too.o
8139too Fast Ethernet driver 0.9.18a
invalid operand: 0000
CPU: 0
EIP: 0010:[<c010c4f0>]
EFLAGS: 00010246
eax: 00000000 ebx: c406b800 ecx: 00000cf8 edx: 00000cfc
esi: 000000fc edi: c406b800 ebp: xx802da0 esp: c41ade78
ds: 0018 es: 0018 ss: 0018
Process insmod (pid: 25, stackpage=c41ad000)
Stack: c010cc6b c406b800 ...
Call Trace: [<c010cc6b>] [<c017f96f>] ...
Code: ff ff ff ff ff ff 00 20 e0 67 42 6e 08 06 00 01 08 00 06 04
Segmentation fault
ERROR! Failed to install the NIC driver module!
This could be caused by the wrong module for your particular
network interface card. Double check the 'option-129' entry
in your /etc/dhcpd.conf file.
Kernel panic: Attempted to kill init!
-------------------------------------------------------------------------
My /etc/dhcpd.conf file:
deny unknown-clients ;
option domain-name "company.com" ;
option domain-name-servers 172.16.1.4 ;
subnet 172.16.0.0 netmask 255.255.0.0
{
option routers 172.16.3.254 ;
}
group {
option root-path "172.16.1.40:/opt/ltsp/i386";
filename "/lts/vmlinuz-2.4.9-ltsp-5";
next-server 172.16.1.40 ;
use-host-decl-names on;
host node133 {
hardware ethernet 00:50:2c:60:7a:34 ;
fixed-address 172.16.11.133 ;
}
-------------------------------------------------------------------------
Additional question:
We had certain network problems with the clients, using 10Mbps
half-duplex
network connection. Those clients could have 5-10 freezings and even
crashes, especially when they were connected to the old slow HUB.
If I rlogin to the client node and type in
/sbin/ifconfig:
eth0 Link encap:Ethernet HWaddr 00:90:27:B6:BA:F5
inet addr:172.16.1.20 Bcast:172.16.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:195126 errors:0 dropped:0 overruns:0 frame:0
TX packets:188318 errors:5 dropped:0 overruns:0 carrier:5
collisions:64622 txqueuelen:100
Interrupt:20 Base address:0xdcc0
Take a look at collision number!
Recently we connected every client to the new and fast switch.
So, now every client has 10Mbps full-duplex.
No more freezings, no more crashes (so far). Collision number is 0.
The problem has been solved, but still, why can't we use slow network?
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