schedule_deferred(9)

okay bestie, welcome to schedule_deferred(9) from the Kernel API Manual — she’s a tiny kernel function with main-character energy, and we’re gonna get you fluent in her whole vibe 🦋✨

💖 NAME 💖

schedule_deferred — schedule execution of deferred actions on an rq. That’s the name, and yes it’s giving “short but powerful” 👑.

✨ SYNOPSIS ✨

void schedule_deferred (struct rq *rq );

Return type is void, so there’s no return value to screenshot and post — she just does the thing and exits 💅.

🎀 ARGUMENTS 🎀

• rq — target rq 🎯. This is the target rq, periodt — the one this call is aimed at.

💅 DESCRIPTION 💅

Okay so the tea ☕: schedule_deferred schedules execution of deferred actions on rq 💖. Those deferred actions are executed with rq locked but unpinned, which is lowkey the key detail — and thus they can unlock rq to e.g. migrate tasks to other rqs. That’s literally the whole mechanic, and it’s highkey iconic for something so smol 🔥.

🔥 SEE ALSO 🔥

the whole extended universe, bestie — every ref below is invited to the group chat, no cap 💖

• Kernel file ./kernel/sched/ext/ext.c — source file vibes 🗂️
• scx_is_descendant(9), rq_is_open(9), scx_fill_cmask_scratch(9), scx_call_op_set_cpumask(9), nldsq_next_task(9)
• nldsq_cursor_next_task(9), nldsq_cursor_lost_task(9), scx_task_iter_start(9), scx_task_iter_unlock(9), scx_task_iter_relock(9)
• scx_task_iter_stop(9), scx_task_iter_next(9), scx_task_iter_next_locked(9), scx_dump_event(9), wait_ops_state(9)
• scx_cpu_valid(9), schedule_deferred_locked(9), dsq_insert_head(9), set_task_slice_keep_oob(9), scx_task_slice_ended(9)
• move_remote_task_to_local_dsq(9), unlink_dsq_and_switch_rq_lock(9), move_task_between_dsqs(9), dispatch_to_local_dsq(9), finish_dispatch(9)
• scx_prio_less(9), __scx_init_task(9), task_dead_and_done(9), scx_tg_sched(9), scx_tg_knob_sched(9)
• handle_lockup(9), scx_rcu_cpu_stall(9), scx_softlockup(9), scx_hardlockup(9), unbypass_renotify_idle(9)
• scx_bypass(9), scx_propagate_exit_irq_workfn(9), scx_flush_disable_work(9), print_scx_info(9), scx_bpf_dsq_insert___v2(9)
• __scx_bpf_dsq_insert_vtime(9), scx_bpf_dispatch_nr_slots(9), scx_bpf_dispatch_cancel(9), scx_bpf_dsq_move_to_local___v2(9), scx_bpf_dsq_move_set_slice(9)
• scx_bpf_dsq_move_set_vtime(9), scx_bpf_dsq_move(9), scx_bpf_dsq_move_vtime(9), scx_bpf_reenqueue_local(9), scx_bpf_create_dsq(9)
• scx_bpf_task_set_slice(9), scx_bpf_task_set_dsq_vtime(9), scx_bpf_kick_cpu(9), scx_bpf_kick_cid(9), scx_bpf_dsq_nr_queued(9)
• scx_bpf_destroy_dsq(9), bpf_iter_scx_dsq_new(9), bpf_iter_scx_dsq_next(9), bpf_iter_scx_dsq_destroy(9), scx_bpf_dsq_peek(9)
• scx_bpf_dsq_reenq(9), scx_bpf_reenqueue_local___v2(9), scx_bpf_exit_bstr(9), scx_bpf_error_bstr(9), scx_bpf_dump_bstr(9)
• scx_bpf_cpuperf_cap(9), scx_bpf_cidperf_cap(9), scx_bpf_cpuperf_cur(9), scx_bpf_cidperf_cur(9), scx_bpf_cpuperf_set(9)
• scx_bpf_cidperf_set(9), scx_bpf_nr_node_ids(9), scx_bpf_nr_cpu_ids(9), scx_bpf_nr_cids(9), scx_bpf_nr_online_cids(9)
• scx_bpf_online_cmask(9), scx_bpf_this_cid(9), scx_bpf_get_possible_cpumask(9), scx_bpf_get_online_cpumask(9), scx_bpf_put_cpumask(9)
• scx_bpf_task_running(9), scx_bpf_task_cpu(9), scx_bpf_task_cid(9), scx_bpf_locked_rq(9), scx_bpf_cpu_curr(9)
• scx_bpf_cid_curr(9), scx_bpf_tid_to_task(9), scx_bpf_now(9), scx_bpf_events(9), scx_bpf_task_cgroup(9)

bye bestie! source/version: ./kernel/sched/ext · date: October 2026 · page: schedule_deferred(9) — mwah 💋💖