memblock_add_node(9)

💖 memblock_add_node(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is memblock_add_node(9), and honestly? she's a baddie. this is the page for the function that literally adds a brand new memblock region inside a NUMA node. no cap.

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✨ NAME ✨

memblock_add_node — add new memblock region within a NUMA node 🫶

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🌸 SYNOPSIS 🌸

int __init_memblock memblock_add_node (phys_addr_t base , phys_addr_t
size , int nid , enum memblock_flags flags );

like, that's the whole signature. __init_memblock, returns an int, takes four args. iconic behavior tbh 💅

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🎀 ARGUMENTS 🎀

• base — the base address of the new region. where the vibe starts ✨
• size — the size of the new region. how much room she's taking up 💖
• nid — the nid of the new region. that's her NUMA node, her home base 🏠
• flags — the flags of the new region. her whole personality, basically 🌈

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🦋 DESCRIPTION 🦋

so what she actually does: she adds a new memblock region, [base, base + size), into the "memory" type. like, the region is half-open — base is in, base + size is out. standard. slay 🔥

for the mode details, she says "See memblock_add_range description" — so if you want the deep lore, that's where you go. iykyk 👑

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⭐ RETURN ⭐

0 on success, -errno on failure. no in-between, she's very binary about it 💀

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🌈 SEE ALSO 🌈

okay this list is LONG but every single one of these is on the page so we're listing all of them, periodt:

• Kernel file ./mm/memblock.c
• memblock overview(9)
• __memblock_find_range_bottom_up(9)
• __memblock_find_range_top_down(9)
• memblock_find_in_range_node(9)
• memblock_find_in_range(9)
• memblock_discard(9)
• memblock_double_array(9)
• memblock_merge_regions(9)
• memblock_insert_region(9)
• memblock_add_range(9)
• memblock_add(9)
• memblock_validate_numa_coverage(9)
• memblock_isolate_range(9)
• memblock_free(9)
• memblock_phys_free(9)
• memblock_setclr_flag(9)
• memblock_mark_hotplug(9)
• memblock_clear_hotplug(9)
• memblock_mark_mirror(9)
• memblock_mark_nomap(9)
• memblock_clear_nomap(9)
• memblock_reserved_mark_noinit(9)
• memblock_reserved_mark_kern(9)
• memblock_mark_kho_scratch(9)
• memblock_clear_kho_scratch(9)
• __next_mem_range(9)
• __next_mem_range_rev(9)
• memblock_set_node(9)
• memblock_alloc_range_nid(9)
• memblock_phys_alloc_range(9)
• memblock_phys_alloc_try_nid(9)
• memblock_alloc_internal(9)
• memblock_alloc_exact_nid_raw(9)
• memblock_alloc_try_nid_raw(9)
• memblock_alloc_hugetlb(9)
• memblock_alloc_try_nid(9)
• __memblock_alloc_or_panic(9)
• memblock_estimated_nr_free_pages(9)
• memblock_is_region_memory(9)
• memblock_is_region_reserved(9)
• memblock_free_all(9)
• reserve_mem_find_by_name(9)
• reserve_mem_release_by_name(9)

ngl that's a whole friend group. read them all, bestie, they're all worth it 💜

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and that's the page!! mwah 💋 this one comes from source ./mm, dated October 2026 — so like, mark your calendars, she's stamped and official. go forth and add your nodes, queen 👑✨🎀