vbg_balloon_deflate(9)

okay so bestie, this is vbg_balloon_deflate(9) from the Kernel API Manual — and yes, it's literally about deflating a balloon one chunk at a time 💅. Tiny page, but we're keeping every crumb, no cap 🍓.

🎈 NAME 🎈

vbg_balloon_deflate — deflate the balloon by one chunk. The caller owns the balloon mutex, bestie. So whoever calls this is already holding the mutex — that's the vibe, and it's not optional 😌.

✨ SYNOPSIS ✨

int vbg_balloon_deflate (struct vbg_dev *gdev , u32 chunk_idx );

🌸 ARGUMENTS 🌸

• gdev — the Guest extension device. Your device struct, main character energy 🫶.
• chunk_idx — the index of the chunk. Which chunk? The chunk being deflated, obviously 💅.

💖 RETURN 💖

Returns 0 or a negative errno value. That's the whole menu, bestie: 0 for the slay ✨, negative errno for the "oop, something's off" 😭. No extra return values hiding in the group chat.

🔥 SEE ALSO 🔥

Kernel file: ./drivers/virt/vboxguest/vboxguest_core.c

The whole friend group 🫶:

• vbg_guest_mappings_init(9)
• vbg_guest_mappings_exit(9)
• vbg_report_guest_info(9)
• vbg_report_driver_status(9)
• vbg_balloon_inflate(9)
• vbg_heartbeat_host_config(9)
• vbg_heartbeat_init(9)
• vbg_heartbeat_exit(9)
• vbg_track_bit_usage(9)
• vbg_reset_host_event_filter(9)
• vbg_set_session_event_filter(9)
• vbg_reset_host_capabilities(9)
• vbg_set_host_capabilities(9)
• vbg_acquire_session_capabilities(9)
• vbg_set_session_capabilities(9)
• vbg_query_host_version(9)
• vbg_core_init(9)
• vbg_core_exit(9)
• vbg_core_open_session(9)
• vbg_core_close_session(9)
• vbg_req_allowed(9)
• vbg_core_ioctl(9)
• vbg_core_set_mouse_status(9)

Source/version: ./drivers/virt/vboxguest · Date: October 2026 · Page: vbg_balloon_deflate(9) — bye bestie, slay your kernel journey 💋🌈