Linux page size

Linux supports two page sizes: Normal-sized pages, which I believe are 4kB by default on all architectures, though some architectures allow other values, e.g. 16kB on ARM64 or 8kB, 16kB or 64kB on IA64. These correspond to the deepest level of descriptors on the MMU (what Linux calls PTE).

1. Can we change page size in Linux?
2. Why is page size 4KB?
3. What is the size of a page?
4. What is Getconf in Linux?
5. What is Page Size x86?
6. Is Page size fixed?
7. What is the size of page table?
8. What is optimal page size?
9. What is the maximum and minimum page size in OS?
10. What is the best page size design in operating system?
11. What is page size A4?

Can we change page size in Linux?

3 Answers. The PAGESIZE is set at kernel compile time. That selection is only valid for i386 hardware. If you run a 64-bit system or any other architecture, the page size is 4K and cannot be changed.

Why is page size 4KB?

Abstract: A 4 KB page size has been used for Virtual Memory since the sixties. Choosing a page size is finding the middle ground between several factors. ... On the one hand, a smaller page will reduce fragmentation; thus saving memory space.

What is the size of a page?

With print documents, page size refers to the size of the paper for the final printed document. Examples include letter size (8.5 x 11-inches) or legal (8.5 x 14-inches).

What is Getconf in Linux?

The getconf command, invoked with the SystemwideConfiguration parameter, writes the value of the variable, as specified by the SystemwideConfiguration parameter, to standard output. ... If the variable name is invalid or an error occurs, a diagnostic message is written to the standard error.

What is Page Size x86?

x86-32 without PAE. 4KB. 4MB.

Is Page size fixed?

Page size is usually determined by the processor architecture. Traditionally, pages in a system had uniform size, such as 4,096 bytes. However, processor designs often allow two or more, sometimes simultaneous, page sizes due to its benefits.

What is the size of page table?

The math is much easier if we round to bytes: each entry is 4 bytes. Thus the total size of the page table is 2^20 entries * 2^2 bytes/entry = 2^22 bytes = 4MB.

What is optimal page size?

2. 2 votes. Optimal page size= sqrt(2.S.E)

What is the maximum and minimum page size in OS?

Page Table Size- Thus, minimum page size possible = 2¹⁸ bytes or 256 KB.

What is the best page size design in operating system?

Thus, Optimal page size = 256 bytes.

What is page size A4?

International Paper Sizes and Dimensions

The most common of these sheet sizes is the international letterhead size A4, which measures 8-1/4 x 11-3/4 in, or 210 x 297 mm. These paper measurements are defined by the ISO 216 standard.