swap_update_readahead(9)

✨ NAME ✨

okay so welcome to the Kernel API Manual page for swap_update_readahead(9), bestie! Here's the actual lore: swap_update_readahead — update the readahead statistics of VMA or globally. That's the whole vibe. 🦋

🫶 SYNOPSIS 🫶

The signature is literally this, character for character:

void swap_update_readahead (struct folio *folio , struct vm_area_struct *vma , unsigned long addr );

💅 ARGUMENTS 💅

• folio — the swap cache folio that just got hit. Like, this is the folio that just scored the hit, main character energy. ✨
• vma — the VMA that should be updated. It can be NULL for a global update, so if it's null it's giving global, not broken. 💜
• addr — the addr that triggered the swapin. If vma is NULL, this one is ignored entirely. 🙈

🌈 SEE ALSO 🌈

The cross-refs are living in Kernel file ./mm/swap_state.c, and here is every single one, no cap:

• swap_cache_get_folio(9)
• swap_cache_has_folio(9)
• swap_cache_get_shadow(9)
• __swap_cache_add_check(9)
• __swap_cache_add_folio(9)
• __swap_cache_del_folio(9)
• swap_cache_del_folio(9)
• __swap_cache_replace_folio(9)
• swap_cache_alloc_folio(9)
• swapin_sync(9)
• swap_cluster_readahead(9)
• swap_vma_readahead(9)
• swapin_readahead(9)

that's the whole page, bestie 🫶 — source/version: ./mm, date: October 2026. mwah 💋