scx_task_iter_relock(9)
π scx_task_iter_relock π
okay so this is a page from the Kernel API Manual, and it's about scx_task_iter_relock(9) β yes that's a mouthful, we'll get through it together bestie π«Ά
β¨ NAME β¨
scx_task_iter_relock β grab scx_tasks_lock back, and optionally also @p's rq while you're at it π
πΈ SYNOPSIS πΈ
void scx_task_iter_relock (struct scx_task_iter *iter, struct task_struct *p);
π¦ ARGUMENTS π¦
iterβ the iterator you wanna relock, bestie. that's the one.pβ the task whose rq you want locked, orNULLif you only wantscx_tasks_lockand nothing else. no rq for you, just the plain lock π
π DESCRIPTION π
so this is the counterpart to scx_task_iter_unlock β like, the other half of the duo, the remix, the re-acquisition arc β¨
locking p's rq is optional. you can take it or leave it, no pressure, we're not like that.
once they're re-acquired though? both locks are managed by the iterator from here on out, periodt. the iterator is the main character now π
π₯ SEE ALSO π₯
the kernel file lives at ./kernel/sched/ext/ext.c, and honestly the whole friend group is here, so let's do the roll call π
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_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(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)
and that's the whole vibe check bestie π this page is from the ./kernel/sched/ext corner of the kernel and it's dated October 2026 β go forth and relock responsibly, ily π§β¨
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms