trace_alloc_vmap_area(9)

✨ trace_alloc_vmap_area(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a little tracepoint page, and honestly? it's giving "developer debug era" and i'm kinda obsessed. no cap, it's short but it matters.

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🌸 NAME 🌸

trace_alloc_vmap_area — literally the thing that gets called when a new vmap allocation happens 🦋

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⭐ SYNOPSIS ⭐

void trace_alloc_vmap_area (unsigned long addr , unsigned long size ,
       unsigned long align , unsigned long vstart , unsigned long vend , int
       failed );

like, that's the whole signature, character for character, don't come for me 💅

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🎀 ARGUMENTS 🎀

• addr — the allocated address 🏠 like, where it actually landed
• size — the size that was requested, bestie 📏
• align — the alignment that was requested (yes it matters, no you can't skip it) ✨
• vstart — the requested start of the range 🌸
• vend — the requested end of the range 🌈
• failed — an int that says whether the allocation failed or not 💀 (rude of it, but okay)

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💜 DESCRIPTION 💜

so this event is used for a debug purpose — like, it's not out here doing main character kernel work, it's the hype friend taking notes 📝

it can give a developer extra information about two things:

• how often it occurs 👀
• which parameters are passed, so they can be used for further validation 🔍

that's it. that's the whole vibe. lowkey iconic for how much it tells you with so little 🫶

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🧚 SEE ALSO 🧚

• Kernel file ./include/trace/events/vmalloc.h 📁
• trace_purge_vmap_area_lazy(9)
• trace_free_vmap_area_noflush(9)

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and that's the page, bestie!! 🎀 this one's from ./include/trace/events, dated October 2026, and it's filed under trace_alloc_vmap_area(9) — go forth and debug, you absolute legend 👑💅🔥