dup_mm(9)

dup_mm(9) 💅

okay so this is the dup_mm(9) page from the Kernel API Manual, and bestie, it’s literally about duplicating an mm structure. iconic kernel behavior, no cap ✨

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🌸 NAME 🌸

dup_mm — duplicates an existing mm structure 💖

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✨ SYNOPSIS ✨

struct mm_struct * dup_mm (struct task_struct *tsk , struct mm_struct *oldmm );

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🎀 ARGUMENTS 🎀

• tsk — the task_struct with which the new mm will be associated 🫶
• oldmm — the mm to duplicate 🌸

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🦋 DESCRIPTION 🦋

okay so it allocates a new mm structure and duplicates the provided oldmm structure content into it. that’s the whole vibe: new mm, copied content from oldmm, slay 💅

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💖 RETURN 💖

the duplicated mm or NULL on failure 😭

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/fork.c 🧚
• set_mm_exe_file(9)
• replace_mm_exe_file(9)
• get_mm_exe_file(9)
• get_task_exe_file(9)
• get_task_mm(9)
• pidfd_prepare(9)
• clone3_stack_valid(9)
• sys_clone3(9)

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byeee 💋 this page says source/version ./kernel and date October 2026, periodt 🫶✨