The paging mechanism allows the operating system to store processes in pages that can be accessed quickly. The main memory is basically divided into fixed-size small blocks, called frames. Each frame contains one page of data with maximum utilization for faster access. It avoids external fragmentation when guests or other applications utilize large amounts within their address spaces without over-utilizing physical RAM available on a processor (which would cause it not to work properly).
What is Paging Protection?
The protection of the paging process is achieved by using an additional bit that can be set as either valid or invalid. When pages need to be written into memory, they are referred and associated with this first bit for their corresponding page table entry, which will determine if it’s allowed access or not. When reading back data from a specified address on your computer system (or another device), then one would only want those particular bits enabled so we don’t end up accessing illegal areas!
Advantages of Paging
Here are the advantages of using the Paging method:
- The memory management algorithm is easy to use.
- No need for external fragmentation.
- It is easy to swap between page frames and equal-sized pages.
Disadvantages of Paging
Here are the drawbacks/ cons of Paging:
- It may cause internal fragmentation.
- Page table may consume extra memory.
- Multi-level Paging can lead to an overhead memory reference.
Do you know why anti-spyware software is important to online security? If you want to know about it then click here: Why is Anti-spyware software important to my online security?
