2
OPERATING SYSTEM DESIGN
Introduction
The report is prepared with the end goal of getting familiar with the Linux kernel and
for the establishment of the goal the locally installed kernel of the Linux system is modified
in multiple places. The main areas of modification are the process management, system call,
memory and file management operations and the codes used for the modification are attached
in the report. The kernel of the Linux consists of different utility scripts and for the
modification of the code the original source of the code is needed to be found and modified
for recompilation. For proceeding with the assignment the fork () system call is used for the
creation of a process. The system call can be added to the Linux kernel for operation and the
steps used for adding the system call is also demonstrated in the report.
Description of the changes
The kernel is modified to divide the parent and the child processes using the fork()
system call. For the modification of the kernel the latest ketnel is needed to be downloaded
using the command “wget http://www.kernel.org/pub/linux/kernel/v2.4/linux-2.4.19.tar.gz”
and after the completion of the downloading process it is needed to be extracted and installed
in the system using the command “tar zxvf linux-2.4.19.tar.gz”. The user needs to enter into
the directory for the modification of the changes using the command “cd linux-2.4.19”1. The
kernel options can be modified using the command make menuconfig. The existing
configuration from the old .config can be copied and the command make old config should be
used in place of menuconfig. The previous settings can be carried over and a message would
be prompted if a new feature is found that does not covers the previous .config files.
1 Liang, Lihao, Paul E. McKenney, Daniel Kroening, and Tom Melham. "Verification of tree-based hierarchical
read-copy update in the Linux kernel." In Design, Automation & Test in Europe Conference & Exhibition
(DATE), 2018, pp. 61-66. IEEE, 2018.

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