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Ch7 記憶體管理
第 11 題／共 40 題
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11. Memory Management、Slab Allocator、Page Table、x86-64
#OS-07-011
中
Memory Management
Slab Allocator
Page Table
x86-64
📝
☆
Which of the following statements on memory management is (are) true?
A
(a) Managing memory via the slab allocator not only minimizes internal and external fragmentations but also efficiently handles the frequent allocation and deallocation of kernel objects.
B
(b) As page tables are per-process data structures, the page table and the other register values (like the instruction pointer) are together stored in the process control block of each process.
C
(c) The x86 64-bit CPU architecture currently provides a 48-bit virtual address with support for page sizes of 4 KB, 2 MB, or 1 GB. Larger page sizes help reduce the overhead of page table traversal.
D
(d) After enabling the memory-management unit (MMU), the user program never accesses the real physical addresses. That is, the user program can only work on the virtual address space.
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