vmballoon_add_page(9)

📦 version 7.3.1, in nixpkgs unstable

💖 vmballoon_add_page(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, it's giving official, it's giving documentation-core, and we're about to make it make sense. this one's a kernel function page, vmballoon_add_page(9), and it's genuinely so simple you'll be like "wait that's it?" 🫶

✨ NAME ✨

vmballoon_add_page — adds a page towards lock/unlock operation. that's the whole vibe. it's a helper that feeds a page into the ballooning batch so the lock or unlock can actually go down. slay 🎀

🌸 SYNOPSIS 🌸

void vmballoon_add_page (struct vmballoon *b , unsigned int idx , struct page *p );

returns void, so no return-value anxiety, no "did it work" spiral. it just does the thing. 💅

🦋 ARGUMENTS 🦋

  • b — pointer to the balloon. like, the struct vmballoon itself, the main character of this whole file 👑
  • idx — index of the page to be ballooned in this batch. so like, which slot in the batch this page is claiming 🎯
  • p — pointer to the page that is about to be ballooned. the actual page, the one headed for balloon town 🎈

🔥 DESCRIPTION 🔥

adds the page to be ballooned. that's it. that's the function. it takes your page and files it into the batch so the lock/unlock operation has something to work with ✨

⚠️ the real tea: must be called while holding comm_lock. fr fr, do not skip this. no cap. hold the lock or don't call it at all, bestie 😭

💜 SEE ALSO 💜

kernel file ./drivers/misc/vmw_balloon.c, plus the whole friend group of related pages — go read them, they're iconic:

and that's the page!! 🌈 sign-off time: this one lives in ./drivers/misc, dated October 2026, and it's filed under vmballoon_add_page(9). ok bye bestie, go hold that comm_lock 💖🧚

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