update_mpp(9)

💖 update_mpp(9) 💖

okay so welcome to the Kernel API Manual entry for update_mpp(9), bestie — this one is short but lowkey iconic in its own chaotic little way ✨

---

🌸 NAME 🌸

update_mpp — and that's literally it, the original leaves the description blank, not me being mysterious 💀

---

✨ SYNOPSIS ✨

copy this exactly, no cap:

ssize_t update_mpp (u64 *entitlement , u8 *weight );

---

🎀 ARGUMENTS 🎀

• entitlement — -- undescribed -- 🙈 the original really just says that, fr fr
• weight — -- undescribed -- 😭 same vibe, no extra lore given

bestie note: both arguments are marked as undescribed in the source page, so I'm not gonna invent backstory. periodt.

---

💅 DESCRIPTION 💅

So update_mpp updates the memory entitlement and weight for the partition. The caller must specify either a new entitlement or a new weight — not both — to be updated, because the h_set_mpp call takes both entitlement and weight as parameters. That's the whole thing, and the way it's giving "small function, strict rules" is honestly a mood 🫶

---

🦋 SEE ALSO 🦋

• Kernel file: ./arch/powerpc/platforms/pseries/lparcfg.c
• parse_mpp_data(9)
• parse_mpp_x_data(9)

---

🎀 that's the whole page, bestie — source/version: ./arch/powerpc/platforms/pseries, dated October 2026, page update_mpp(9) 💖