proc_pid_stack(5)

✨ proc_pid_stack(5) ✨

okay bestie, we're doing a section 5 page today — that's the file formats crew — and this one is literally all about the little kernel-stack peeky-peek file 💅

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🎀 NAME 🎀

/proc/pid/stack — the kernel stack, fr fr

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🦋 DESCRIPTION 🦋

🌸 /proc/pid/stack (since Linux 2.6.29)

So picture this: you've got a process, right? And this file is gonna give you a symbolic trace of the function calls in this process's kernel stack. Like a little receipt of everything the kernel is doing on the stack for that pid. iconic behavior honestly ✨

🚨 important though bestie: this file is only provided if the kernel was built with the CONFIG_STACKTRACE configuration option. No CONFIG_STACKTRACE? No file. That's just how it is 💀

And the vibe check on who gets to read it? Permission to access this file is governed by a ptrace access mode PTRACE_MODE_ATTACH_FSCREDS check — so go read ptrace(2) for the deets. it's giving "you need clearance for this one" 🔐

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💖 SEE ALSO 💖

• proc(5)

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and that's the whole page, no notes 🫶

~ a little sign-off from your girl: this was from Linux man-pages 6.20, dated 2026-02-08 🌈 star ⭐