Module pagesize

Helpers to calculate values derived from page size.

This has performance benefits from:

• Avoiding calling sysconf(_SC_PAGESIZE) multiple times by caching the shift bit.
• Using the (faster) shift instruction instead of (slower) multiply/divide instruction.

Constants

TRANSPARENT_HUGEPAGE_SIZE_PATH 🔒

Statics

PAGESIZE_SHIFT 🔒

THP_SIZE

The transparent hugepage size loaded from /sys/kernel/mm/transparent_hugepage/hpage_pmd_size.

Functions

addr_to_page_idx

The page index of the page which contains the “addr”.

bytes_to_pages

Converts the bytes to number of pages.

is_hugepage_aligned

Returns whether the address/size is aligned with hugepage.

is_page_aligned

Returns whether the address/size is aligned with page.

load_transparent_hugepage_size 🔒

page_base_addr

The head address of the page which contains the “addr”.

page_idx_to_addr

The head address of the page.

pages_to_bytes

Converts number of pages to byte size.

round_up_hugepage_size

Rounds up the address/size with the hugepage size.