swapin_readahead(9)

💅 swapin_readahead(9) ✨

okay bestie, this one's straight out of the Kernel API Manual and it's giving "pre-game your memory access" energy 🫶

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🌸 NAME 🌸

swapin_readahead — swap in pages in hope we need them soon 💖

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✨ SYNOPSIS ✨

struct folio * swapin_readahead (swp_entry_t entry , gfp_t gfp_mask ,
struct vm_fault *vmf );

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🎀 ARGUMENTS 🎀

• entry — the swap entry of this memory, iykyk 🌀
• gfp_mask — the memory allocation flags, iconic little permission slips ✨
• vmf — fault information, the receipts of the fault situation 💅

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🦋 DESCRIPTION 🦋

So it returns the struct folio for entry and addr, after queueing swapin. periodt. 💖

It's literally the main entry function for swap readahead 🔥. By the configuration, it will read ahead blocks by cluster-based (ie, physical disk based) or vma-based (ie, virtual address based on faulty address) readahead. no cap, those are the two vibes 🌈

not me being obsessed with a readahead function, but here we are 😭

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🔥 SEE ALSO 🔥

the kernel file ./mm/swap_state.c is the source bestie, and the whole squad is:

• 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)
• swap_update_readahead(9)
• swapin_sync(9)
• swap_cluster_readahead(9)
• swap_vma_readahead(9)

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xoxo, your kernel bestie 💖 this one's sourced from ./mm, dated October 2026 — slay and goodbye 🎀✨