STRUCT CPU_TIMER(9)

💅 struct cpu_timer(9) 💅

okay so bestie, welcome to the Kernel API Manual 💖 this page is literally all about struct cpu_timer — the Posix CPU timer representation for k_itimer. yes that is the whole NAME section and yes it slays 🎀

✨ SYNOPSIS ✨

lowkey the whole vibe is right here, no cap:

struct cpu_timer {
    struct timerqueue_node          node;
    struct timerqueue_head          *head;
    struct pid                      *pid;
    struct list_head                elist;
    bool firing;
    bool nanosleep;
    struct task_struct *handling;
 };

🌸 Members 🌸

every field is a main character, let's meet them 🫶

• node — the timerqueue node that gets queued up in the task/sig 🦋
• head — the timerqueue head this timer is queued on, iykyk 💫
• pid — a pointer to the target task PID 👑
• elist — list head for the expiry list, iconic 💅
• firing — timer is currently firing 🔥 like right now, actively doing the thing
• nanosleep — this timer is used for nanosleep and is not a regular posix-timer 🙈 important distinction bestie
• handling — pointer to the task which handles expiry ⭐

👀 SEE ALSO 👀

• Kernel file ./include/linux/posix-timers.h
• struct k_itimer(9)

k bye bestie, go read those headers 💜✨

this masterpiece came from ./include/linux, dated October 2026, and yeah it's signed struct cpu_timer(9) at the bottom, periodt 🎀💖