Over the past decade, researches on operating systems have been shifted from monolithic kernels towards microkernels for several reasons. Of them are: (1) It is easier to understand and debug because the kernel is much smaller. (2) It is much more secure and flexible because the kernel is small, and most of the kernel functions can be implemented as servers running in the user space instead of in the kernel space. (3) The message passing technique that is in the core of the microkernel has been improved, and thus the overhead required for the message passing has been highly reduced.
Minix 3 is one of the microkernels developed over the past decade and is aimed for educational purpose and small PCs. It is implemented on the IA-32 architecture and is based on the segmented memory model of IA-32. The purpose of this thesis is to use Minix 3 as a case study and to convert the segmented memory model adopted by the current implementation to coexisted with the demand paged memory model, which is also supported by the IA-32 architecture. That said, the thesis can be divided into two parts: The first part is to implement a new server called pager, which would take over the memory management subsystem of the Minix 3 microkernel and be used to offload the overhead of the kernel. The second part is to implement a virtual memory management subsystem that uses the segmentation with paging memory model of the IA-32 architecture.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0127108-161952 |
| Date | 27 January 2008 |
| Creators | Lin, Siou-Jing |
| Contributors | Shiann-Rong Kuang, Ming-Chao Chiang, Chung-nan Lee |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0127108-161952 |
| Rights | restricted, Copyright information available at source archive |
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