PMAP_MINCORE(9)

✨ PMAP_MINCORE(9) ✨

okay bestie, welcome to the Kernel Developer's Manual section 9 💅 this one's about pmap_mincore — yes, the 9 means it's a kernel dev page, we're in the deep end now, and you're gonna slay it fr fr 🫶

🌸 NAME 🌸

pmap_mincore — figure out if a virtual address is actually chillin' in physical memory or not 🧚

🦋 SYNOPSIS 🦋

#include <sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>

int
pmap_mincore(pmap_t pmap, vm_offset_t addr);

💖 DESCRIPTION 💖

So like. The pmap_mincore() function determines if the page at the virtual address addr in the physical map pmap is resident in physical memory. ✨

It's the machine-dependent interface that the mincore(2) system call uses. iykyk 😌 — the generic mincore(2) call taps pmap_mincore() to do the actual platform-specific detective work. no cap.

👑 RETURN VALUES 👑

If the page is resident in physical memory, a mask of flags gets returned, and the meaning of those flags is documented over in mincore(2). 📋✨ Otherwise? You get 0. that's it, that's the whole vibe.

⚠️ important things, bestie: the pmap must exist and addr must be mapped into the pmap. If any error occurs, the machine-dependent implementation should return 0. don't skip this part, it's lowkey the whole point 🙈

🎀 SEE ALSO 🎀

• mincore(2)
• pmap(9)

🌈 AUTHORS 🌈

This manual page was written by Bruce M Simpson <bms@spc.org>. iconic behavior honestly 👑

and that's a wrap on PMAP_MINCORE(9) from the Kernel Developer's Manual 💅 this lil gem is courtesy of Debian, dated July 21, 2003 — vintage but still serving ✨ go forth and check your residency, bestie, ily, bye 🦋🌸💜