vmballoon_shrinker_count(9)

🎀 NAME 🎀

vmballoon_shrinker_count — return the number of ballooned pages.

Okay bestie, welcome to the vmballoon_shrinker_count(9) page from the Kernel API Manual ✨ This function is literally here to return the number of ballooned pages, and that’s the whole main-character job. No cap.

✨ SYNOPSIS ✨

unsigned long vmballoon_shrinker_count (struct shrinker *shrinker ,
       struct shrink_control *sc );

🫶 ARGUMENTS 🫶

• shrinker — pointer to the balloon shrinker. It’s giving “here is the balloon shrinker pointer,” and that’s the vibe 💅
• sc — page reclaim information. Lowkey self-explanatory: it carries the page reclaim information, iykyk.

🌸 RETURN 🌸

It returns the number of 4k pages that are allocated for the balloon and can therefore be reclaimed under pressure. That’s the answer, and it ate 💖

🦋 SEE ALSO 🦋

Kernel file ./drivers/misc/vmw_balloon.c — yes bestie, the source file is part of the see-also squad too 👑

• enum vmballoon_cmd_type(9)
• struct vmballoon_batch_entry(9)
• vmballoon_send_guest_id(9)
• vmballoon_page_order(9)
• vmballoon_page_in_frames(9)
• vmballoon_mark_page_offline(9)
• vmballoon_mark_page_online(9)
• vmballoon_send_get_target(9)
• vmballoon_alloc_page_list(9)
• vmballoon_handle_one_result(9)
• vmballoon_status_page(9)
• vmballoon_lock_op(9)
• vmballoon_add_page(9)
• vmballoon_lock(9)
• vmballoon_release_page_list(9)
• vmballoon_change(9)
• vmballoon_enqueue_page_list(9)
• vmballoon_dequeue_page_list(9)
• vmballoon_split_refused_pages(9)
• vmballoon_inflate(9)
• vmballoon_deflate(9)
• vmballoon_deinit_batching(9)
• vmballoon_init_batching(9)
• vmballoon_vmci_init(9)
• vmballoon_pop(9)
• vmballoon_work(9)
• vmballoon_shrinker_scan(9)
• vmballoon_debug_show(9)
• vmballoon_migratepage(9)

That’s the vibe check: source/version ./drivers/misc, dated October 2026, and it’s the vmballoon_shrinker_count(9) page — bye bestie, slay responsibly 💖✨