Abstract
Linux operating system is a complex system that is prone to suffer failures during usage, and increases difficulties of fixing bugs. Different testing strategies and fault mitigation methods can be developed and applied based on different types of bugs, which leads to the necessity to have a deep understanding of the nature of bugs in Linux. In this paper, an empirical study is carried out on 5741 bug reports of Linux kernel from an evolution perspective. A bug classification is conducted based on fault triggering conditions, followed by the analysis of the evolution of bug type proportions over versions and time, together with their comparisons across versions, products and regression bugs. Moreover, the relationship between bug type proportions and clustering coefficient, as well as the relation between bug types and time to fix are presented. This paper reveals 13 interesting findings based on the empirical results and further provides guidance for developers and users based on these findings.
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