workingset_eviction(9)

✨ workingset_eviction(9) ✨

okay so bestie, welcome to the kernel API manual 🫶 this one's a <pink>kernel API manual</pink> page and it's all about <hotpink>workingset_eviction</hotpink — like, literally noting the eviction of a folio from memory. that's the whole vibe. 💅

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🌸 NAME 🌸

workingset_eviction — note the eviction of a folio from memory ✨

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🦋 SYNOPSIS 🦋

void * workingset_eviction (struct folio *folio , struct mem_cgroup
*target_memcg );

like yes, that's the signature, copy it exactly, no notes 📝

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🎀 ARGUMENTS 🎀

• folio — the folio being evicted. that's the main character here 👑 it's the one getting kicked out of memory, no cap.
• target_memcg — the cgroup that is causing the reclaim. like, this is who's doing the evicting 🙈 so you know whose fault it is.

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💜 RETURN 💜

it hands you back a <purple>shadow entry</purple> ✨ and that shadow entry is meant to be stored in folio->mapping->i_pages in place of the evicted folio — so that a later <rainbow>refault</rainbow> can be detected. that's the whole point, iykyk 💫

lowkey important: the shadow entry goes in place of the folio inside folio->mapping->i_pages. that's the swap, bestie. 🔁

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🌈 SEE ALSO 🌈

• the kernel file ./mm/workingset.c 📁
• workingset_age_nonresident(9)
• workingset_test_recent(9)
• workingset_refault(9)
• workingset_activation(9)

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okay that's the whole page, go be iconic with it 💖 sign-off time: this one comes from ./mm, dated <cyan>October 2026</cyan> — mwah, stan the kernel, periodt. 🎀🦋💅