page_ext_get(9)

💖 NAME 💖

okay bestie, this is page_ext_get(9) from the Kernel API Manual — and it does exactly what it says on the tin: it grabs the extended information for a page. slay ✨

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🌸 SYNOPSIS 🌸

struct page_ext * page_ext_get (const struct page *page );

that's the whole signature, no cap 💅

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🎀 ARGUMENTS 🎀

• page — the page we're interested in. literally the one you're curious about 🫶

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🦋 DESCRIPTION 🦋

okay so here's the vibe: this guarantees that the page_ext stays valid until page_ext_put is called. that's the whole promise, and it's lowkey iconic 💖

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⭐ RETURN ⭐

it returns NULL if there's no page_ext for this page. no page_ext? NULL. periodt 💀

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🌈 CONTEXT 🌈

works in any context. but heads up bestie: the caller may not sleep until they've called page_ext_put. so no snoozing 😭

no sleeping before page_ext_put, fr fr 🛑💤

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👑 SEE ALSO 👑

the whole squad:

• Kernel file ./mm/page_ext.c
• page_ext_lookup(9)
• page_ext_from_phys(9)
• page_ext_put(9)

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later bestie 💖 — this came from source/version ./mm, dated October 2026. mwah 🎀🫶