In virtual memory paging, the offset portion of a virtual address is inherently limited by the page size, making bounds checking unnecessary.
Claims
In virtual memory paging, the offset portion of a virtual address is inherently limited by the page size, making bounds checking unnecessary.
Parent: Computer ScienceEntity: Virtual Memory PagingImpact: neutralDate: Apr 19, 2026Target: The necessity of bounds checking for the offset in virtual memory paging.
Source posts
L05 Paging
hypothes.is/a/q3ci6DvuEfGXh-Pg7wNAbg
Don’t you need tocompare offsetwith bounds?为什么分页不用?
分页地址结构:
虚拟地址 = VPN + offset
例如页大小 4KB:
offset 范围天然固定:
0 ~ 4095
因为 offset 的位数固定。
若页大小4KB:
2^12 = 4096
所以 offset 就是低12位。
它天然不可能超过页大小。
0 boosts · 0 favs · 0 replies · Apr 19, 2026
L05 Paging
hypothes.is/a/q3ci6DvuEfGXh-Pg7wNAbg
Don’t you need tocompare offsetwith bounds?为什么分页不用?
分页地址结构:
虚拟地址 = VPN + offset
例如页大小 4KB:
offset 范围天然固定:
0 ~ 4095
因为 offset 的位数固定。
若页大小4KB:
2^12 = 4096
所以 offset 就是低12位。
它天然不可能超过页大小。
0 boosts · 0 favs · 0 replies · Apr 19, 2026