memory_group_unregister(9)

okay so bestie, you're looking at memory_group_unregister(9) from the Kernel API Manual, and it's giving “clean up your memory group” energy. 💅

NAME ✨

memory_group_unregister - Unregister a memory group. periodt.

SYNOPSIS 🧚

the signature is literally:

int memory_group_unregister (int mgid );

ARGUMENTS 🎀

• mgid — the memory group id. that's the whole vibe. 🫶

DESCRIPTION 💖

Unregister a memory group. If any memory block still belongs to this memory group, unregistering will fail. no cap. 😭

here's the return-value tea ☕:

• returns -EINVAL if the memory group id is invalid
• returns -EBUSY if some memory blocks still belong to this memory group
• returns 0 if unregistering succeeded

lowkey important: if blocks are still attached, it is not gonna let you unregister. that's the -EBUSY vibe check. 💀

SEE ALSO 🌈

Kernel file ./drivers/base/memory.c is the spot, and the related calls are:

• memory_block_advise_max_size(9)
• memory_block_advised_max_size(9)
• memory_block_add_nid_early(9)
• walk_memory_blocks(9)
• for_each_memory_block(9)
• memory_group_register_static(9)
• memory_group_register_dynamic(9)

mwah 💋 — sourced from ./drivers/base, October 2026 edition. go off, kernel bestie 🫶