get_usable_memory_ranges(9)

💖 get_usable_memory_ranges(9) · Kernel API Manual 💖

okay bestie, welcome to the get_usable_memory_ranges(9) page from the Kernel API Manual — we're getting into usable memory ranges and it's giving kernel-internals main character energy ✨

🌸 NAME 🌸

get_usable_memory_ranges — Get usable memory ranges. This list includes regions like crashkernel, opal/rtas & tce-table, that kdump kernel could use.

🦋 SYNOPSIS 🦋

int get_usable_memory_ranges (struct crash_mem **mem_ranges );

🎀 ARGUMENTS 🎀

• mem_ranges — the range list to add the memory ranges to. Yep, that's the struct crash_mem ** situation, bestie 🫶

💅 DESCRIPTION 💅

Returns 0 on success, negative errno on error. That's the whole return contract, periodt 💀✨

🌈 SEE ALSO 🌈

Kernel file ./arch/powerpc/kexec/ranges.c is the home base 🏠, and these are the sibling functions to check out:

• get_max_nr_ranges(9)
• get_mem_rngs_size(9)
• __add_mem_range(9)
• __merge_memory_ranges(9)
• sort_memory_ranges(9)
• realloc_mem_ranges(9)
• add_mem_range(9)
• add_tce_mem_ranges(9)
• add_initrd_mem_range(9)
• add_htab_mem_range(9)
• add_kernel_mem_range(9)
• add_rtas_mem_range(9)
• add_opal_mem_range(9)
• add_reserved_mem_ranges(9)
• get_reserved_memory_ranges(9)
• get_exclude_memory_ranges(9)
• get_crash_memory_ranges(9)

okay bye bestie 💖 — this page is from source/version ./arch/powerpc/kexec, dated October 2026 ✨