memblock_va...uma_coverage(9)

💅 memblock_validate_numa_coverage(9) 💅

okay so welcome to the Kernel API Manual bestie, this is the page for memblock_validate_numa_coverage and honestly? she's a vibe check for your firmware 🫶

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✨ NAME ✨

memblock_validate_numa_coverage — the girl who checks whether the amount of memory chillin' with no node ID assigned is under a threshold 🎀

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🌸 SYNOPSIS 🌸

bool __init_memblock memblock_validate_numa_coverage (unsigned long
threshold_bytes );

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💖 ARGUMENTS 💖

• threshold_bytes — the maximal memory size that's allowed to have an unassigned node ID, measured in bytes. like, the absolute most memory that can be ~homeless~ before she starts side-eyeing 👀

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🦋 DESCRIPTION 🦋

so here's the tea ☕ — a buggy firmware may report memory that does not belong to any node. rude, honestly. 😭

she checks if the amount of that unassigned-node memory is below threshold_bytes, and that's literally it. simple, iconic, no notes ✨

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⭐ RETURN ⭐

• true on success 💚
• false on failure 💀

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🌈 SEE ALSO 🌈

the whole memblock friend group showed up, no cap:

• 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_node(9)
• memblock_add(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)

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💅 and that's the whole page, periodt 💅

shoutout to ./mm for being the source, the manual version being October 2026, and the page answering to the name memblock_va...uma_coverage(9) — mwah, catch you in the next manpage bestie 💜🎀