Transcription

1 memory management Vaibhav Bajpai OS 2013

2 motivation virtualize resources: multiplex CPU multiplex memory (CPU scheduling) (memory management) why manage memory? controlled overlap processes should NOT overlap in physical memory translation allows to give uniform view of memory to programs CPU virtual address MMU physical address RAM protection a process should NOT access other process memory read-only memory locations: (kernel, process code, et al.)

3 memory management base-bound registers segmentation paging segmentation + paging multi-level page tables inverted page tables

4 base and bound registers base CPU virtual address + physical address RAM limit