nd_pmem_available_dpa(9)

✨ NAME ✨

Okay so bestie, this is nd_pmem_available_dpa(9) from the Kernel API Manual, and it’s literally here to, for the given dimm+region, account unallocated dpa. 🫶

🌸 SYNOPSIS 🌸

resource_size_t nd_pmem_available_dpa (struct nd_region *nd_region , struct nd_mapping *nd_mapping );

🎀 ARGUMENTS 🎀

• nd_region — constrain the available space check to this reference region. That’s the region vibe check, basically. ✨
• nd_mapping — container of dpa-resource-root + labels. It’s giving “mapping container” energy. 💅

💅 DESCRIPTION 💅

Validate that a PMEM label, if present, aligns with the start of an interleave set. No cap, that’s the whole job: alignment check, slay. 🦋

⭐ RETURN ⭐

0 if there is an alignment error, otherwise the unallocated dpa. That’s it, bestie — zero means alignment said “not today,” and anything else is the unallocated dpa. 😭

🌈 SEE ALSO 🌈

• Kernel file ./drivers/nvdimm/dimm_devs.c
• nvdimm_init_nsarea(9)
• nd_pmem_max_contiguous_dpa(9)
• nvdimm_allocated_dpa(9)

And that’s the whole page, bestie 💖 — source/version is from ./drivers/nvdimm, and the date is October 2026. Go forth and align those labels, periodt. ✨👑