vma_shrink(9)

✨ vma_shrink(9) ✨

okay bestie, welcome to the Kernel API Manual side of the group chat — this page is about vma_shrink, and it's literally the “shrink the end of a VMA” manual. no cap 💅

🌸 NAME 🌸

vma_shrink - Shrink the end of a VMA

🦋 SYNOPSIS 🦋

int vma_shrink (struct vma_iterator *vmi , struct vm_area_struct *vma ,
unsigned long end );

🎀 ARGUMENTS 🎀

• vmi — the vma iterator. that's the iterator bestie 🫶
• vma — the VMA to modify. main-character VMA energy, honestly 👑
• end — the new end. yep, the new end, periodt ✨

💖 DESCRIPTION 💖

⚠️ Note that the caller may only shrink the end of the VMA.

fr fr, that's the vibe check: the caller may only shrink the end of the VMA. keep it in mind, bestie 💅

⭐ RETURN ⭐

• 0 on success — slay 🎉
• -ENOMEM otherwise — not slay 😭

🌈 SEE ALSO 🌈

• Kernel file ./mm/vma.c — the source file, iykyk 📁
• mmap_region(9)
• do_brk_flags(9)
• unmapped_area(9)
• unmapped_area_topdown(9)
• vma_mmu_pagesize(9)

xoxo from your ./mm bestie 💌 — October 2026, signed vma_shrink(9) 🫶