Standard Linux Modifications

Install Linux 2.4.19
In this release, kernel patches for the Linux 2.4.19 are provided.
1. When choosing the filesystems to create, we recommend creating a file system called /scored with a space of 1GB for checkpointing, and setting the access rights so all users are permitted access.
2. The host name must be specified with a fully qualified domain name (FQDN).
  For example, server.pccluster.org, instead of just the host name server
Add the PMv2 device drivers to the kernel
SCore includes kernel PMv2 device drivers for Myrinet, 100Mbps and Gigabit Ethernet, and shared memory. Drivers except for PM/Ethernet must be statically linked into the kernel on all compute hosts.
1. To create new kernel source code, issue the following commands:
```
	# cd /usr/srcx
	# tar vxzf linux2.4.19.tar.gz
	# cd linux-2.4.19
If your host has IA64 CPU:
	# patch -p1 -s < linux2.4.19_ia64.score.patch
Otherwise:
	# patch -p1 -s < linux2.4.19.score.patch
```
2. To create a new configuration file for the kernel, execute the following:
```
	# make menuconfig
```
  Then,
  1. Select the ``Character devices'' menu. You will find the following entries:
    
    RWCP PM/Myrinet (Myricom Myrinet PCI) support (NEW)
    RWCP PM/Ethernet support (NEW)
    RWCP PM/Shmem (Shared Memory) support (NEW)
    
    Please select those drivers which are appropriate for your configuration, so that they are STATICALLY linked into the kernel or, in other words, as a built-in driver. To select a driver as a built-in driver, type the y key instead of typing the space key.
    ``RWCP PM/Myrinet (Myricom Myrinet PCI) support (NEW)'' MUST be selected even though the machine may not have a Myrinet card.
    If you select ``RWCP PM/Ethernet support (NEW)'', the following options will also be displayed:
    
    Interrupt-reaping
    Select ``Interrupt-reaping'' to increase PM/Ethernet make performance.
    Be aware that ``RWCP PM/Myrinet (Myricom Myrinet PCI) support (NEW)'' MUST be selected even though the machine may not have a Myrinet card.
  2. Save the configuration, then exit menuconfig.
3. To make a new kernel, perform the following:
  1. Issue the following commands to make and install a new kernel, and update the lilo database.
```
	# insmod loop
	# cd /usr/src/linux
	# make dep clean
	# make
	# make modules
	# make install
	# make modules_install
```
    NOTE: The insmod loop command must be issued before installing the modules.
    Make sure that there are no errors to install the new kernel.
  2. Halt the system and install a Myrinet card, then reboot the system
```
	# /sbin/halt
```
    If a Myrinet card has been installed, the following kernel messages will appear during the boot sequence:
```
Myrinet 9 revison(1) bus(0) iobase(e7000000) irq(c) vmem(d0800000)
```
    Values depend on the version of the Myrinet card and the host system.
    To make sure the PM drivers have been installed, issue the following command:
```
	# dmesg | grep -i pm
```
    You will see several messages. e.g.,
```
PM memory support
Register pm_memory as major(123)
pm[0]: clockval = 90449044, cpu = 403, delay = 0, board = 1, sram = 100000
pm[0]: 30 contexts using 3840K bytes of memory
Register pm as major(121)
PM/Ethernet: "$Id: pm_ethernet_dev.c,v 1.68 2001/02/24 12:48:14 s-sumi Exp$"
PM/Ethernet: register etherpm device as major(122)
pmshmem: version = $Id: pm_shmem.c,v 1.6 2000/09/25 12:42:28 kameyama Exp $
pmshmem_init: register pm_shmem as major(124)
etherpm0: 8 contexts using 2048K bytes of memory, maxunit=2, maxnodes=128.
etherpm0: Interrupt Reaping on eth0, irq 10
```
Be sure that the above procedures are performed on all hosts so that a new kernel is installed on all hosts.

PC Cluster Consotium

CREDIT: This document is a part of the SCore cluster system software developed at PC Cluster Consortium, Japan. Copyright (C) 2003 PC Cluster Consortium.