trace_timer_expire_exit(9)

🌸 NAME 🌸

okay so trace_timer_expire_exit(9) — from the Kernel API Manual, bestie — is literally the function that gets called immediately after the timer callback returns 💅✨

trace_timer_expire_exit — called immediately after the timer callback returns 🫶

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✨ SYNOPSIS ✨

void trace_timer_expire_exit (struct timer_list *timer );

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🎀 ARGUMENTS 🎀

• timer — pointer to struct timer_list, periodt 💖

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🦋 DESCRIPTION 🦋

When you use this in combination with the timer_expire_entry tracepoint, we can determine the runtime of the timer callback function 🔥 like yes, that's the whole point and it ate.

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💀 NOTE 💀

Do NOT dereference timer in TP_fast_assign 😭 the pointer might be invalid. We solely track the pointer. no cap, do not do it.

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🌈 SEE ALSO 🌈

Kernel file ./include/trace/events/timer.h — go look, iykyk 👑

• trace_timer_init(9)
• trace_timer_start(9)
• trace_timer_expire_entry(9)
• trace_timer_cancel(9)
• trace_hrtimer_setup(9)
• trace_hrtimer_start(9)
• trace_hrtimer_expire_entry(9)
• trace_hrtimer_start_expired(9)
• trace_hrtimer_expire_exit(9)
• trace_hrtimer_cancel(9)
• trace_hrtimer_rearm(9)
• trace_itimer_state(9)
• trace_itimer_expire(9)

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source/version: ./include/trace/events 📁 · date: October 2026 🗓️ mwah 💋✨