trace_filter..._remove_task(9)

💖 NAME 💖

okay so bestie, this is the trace_filter..._remove_task(9) page from the Kernel API Manual, and it's literally about trace_filter_add_remove_task — adding or removing a task from a pid_list. slay.

✨ SYNOPSIS ✨

void trace_filter_add_remove_task (struct trace_pid_list *pid_list ,
struct task_struct *self , struct task_struct *task );

🎀 ARGUMENTS 🎀

• pid_list — the list you're modifying. that's the assignment, no cap 💅
• self — the current task when we're doing fork stuff, or NULL when we're exiting. bestie is either here or she's not 🫶
• task — the task being added or removed. main character energy either way ✨

🦋 DESCRIPTION 🦋

so here's the vibe check 🔥 if you're adding a task and self is defined, the task only gets added if self is also included in pid_list. this happens on fork, and tasks should only be added when the parent is listed. periodt.

if self is NULL, then the task pid gets removed from the list — which would happen on exit of a task. okay so that's the whole plot 😭

🌈 SEE ALSO 🌈

kernel file ./kernel/trace/trace_pid.c and these iconic little references:

• trace_find_filtered_pid(9)
• trace_ignore_this_task(9)
• trace_pid_next(9)
• trace_pid_start(9)
• trace_pid_show(9)

sign-off time, bestie 💖 source/version: ./kernel/trace; date: October 2026; page: trace_filter..._remove_task(9) — mwah, go read the kernel code, ily 💅✨