Module swap::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.