htb_add_to_id_tree(9)

💖 NAME

Okay bestie, welcome to htb_add_to_id_tree(9) — yes, that's the Kernel API Manual page, folded right in near the top like a little name tag 🎀.

htb_add_to_id_tree — adds class to the round robin list. That's the whole assignment, and it's giving kernel-tree realness 🌳✨.

✨ SYNOPSIS

void htb_add_to_id_tree (struct rb_root *root , struct htb_class *cl ,
int prio );

🎀 ARGUMENTS

• root — the root of the tree 🌳
• cl — the class to add 🫶
• prio — the give prio in class 💅

🦋 DESCRIPTION

So this routine adds class to the list (actually tree) sorted by classid. Yes, it says list but it's actually a tree — the plot twist is canon 😭🌲.

Make sure that class is not already on such list for the given prio. Like fr fr, check that first, bestie — you do not want a duplicate situation on your hands 🙈💀.

🌈 SEE ALSO

Go read the lore in the kernel file ./net/sched/sch_htb.c and these iconic little functions, iykyk:

• htb_classify(9)
• htb_add_to_wait_tree(9)
• htb_next_rb_node(9)
• htb_add_class_to_row(9)
• htb_remove_class_from_row(9)
• htb_activate_prios(9)
• htb_deactivate_prios(9)
• htb_class_mode(9)
• htb_change_class_mode(9)
• htb_activate(9)
• htb_deactivate(9)
• htb_charge_class(9)
• htb_do_events(9)
• htb_lookup_leaf(9)

Cute sign-off: that's the tea from the source/version line ./net/sched, dated October 2026, and the page is htb_add_to_id_tree(9) 💅💖. Stay slay, kernel bestie 🌟.