Chapter 4 : Virtual Process Memory¶

4.1 Introduction¶

4.2 Virtual Process Address Space¶

Layout of the Process Address Space¶

Creating the Layout¶

4.3 Principle ofMemoryMappings¶

4.4 Data Structures¶

Trees and Lists¶

Representation of Regions¶

The Priority Search Tree¶

4.5 Operations on Regions¶

Associating Virtual Addresses with a Region¶

Merging Regions¶

Inserting Regions¶

Creating Regions¶

4.6 Address Spaces¶

4.7 Memory Mappings¶

Creating Mappings¶

Removing Mappings¶

Nonlinear Mappings¶

4.8 Reverse Mapping¶

Data Structures¶

Creating a Reverse Mapping¶

Using Reverse Mapping¶

4.9 Managing the Heap¶

4.10 Handling of Page Faults¶

4.11 Correction of Userspace Page Faults¶

Demand Allocation/Paging¶

Anonymous Pages¶

Copy on Write¶

Getting Nonlinear Mappings¶

Kernel Page Faults¶

Copying Data between Kernel and Userspace¶

Summary¶

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