cond_resched_tasks_rcu_qs(9)

💅 cond_resched_tasks_rcu_qs(9) — Kernel API Manual ✨

okay so bestie, we're in the Kernel API Manual today and this one is a whole little function with a big name 🎀

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🌸 NAME 🌸

cond_resched_tasks_rcu_qs — the vibe is: report potential quiescent states to RCU 💖 no cap, that's literally the job.

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✨ SYNOPSIS ✨

void cond_resched_tasks_rcu_qs (void );

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🦋 ARGUMENTS 🦋

• void — the icon takes literally no arguments. nothing. zero. empty set. she's self-sufficient, main character energy only 👑 nothing to pass in, bestie.

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🌈 DESCRIPTION 🌈

so here's the tea 🍓 — this function is giving very much cond_resched, like, they're cousins fr fr. but there's a plot twist: cond_resched_tasks_rcu_qs is defined to report potential quiescent states to RCU-tasks even if the whole cond_resched machinery were to be shut off 🔥

and why does that matter? because some people advocate for doing exactly that — shutting the cond_resched machinery off — on PREEMPTION kernels 😭 so this function is the one that keeps reporting those potential quiescent states to RCU-tasks no matter what. she shows up, she does her job, she does not care about the discourse 💅 periodt.

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💜 SEE ALSO 💜

• the kernel file ./include/linux/rcupdate.h — that's where she lives 🏠
• same_state_synchronize_rcu(9)
• rcu_softirq_qs_periodic(9)
• RCU_LOCKDEP_WARN(9)
• lockdep_assert_in_rcu_read_lock(9)
• lockdep_assert_in_rcu_read_lock_bh(9)
• lockdep_assert_in_rcu_read_lock_sched(9)
• lockdep_assert_in_rcu_reader(9)
• unrcu_pointer(9)
• RCU_INITIALIZER(9)
• rcu_assign_pointer(9)
• rcu_replace_pointer(9)
• rcu_access_pointer(9)
• rcu_dereference_check(9)
• rcu_dereference_bh_check(9)
• rcu_dereference_sched_check(9)
• rcu_dereference_all_check(9)
• rcu_dereference_protected(9)
• rcu_dereference(9)
• rcu_dereference_bh(9)
• rcu_dereference_sched(9)
• rcu_dereference_all(9)
• rcu_pointer_handoff(9)
• rcu_read_lock(9)
• rcu_read_unlock(9)
• rcu_read_lock_bh(9)
• rcu_read_unlock_bh(9)
• rcu_read_lock_sched(9)
• rcu_read_unlock_sched(9)
• RCU_INIT_POINTER(9)
• RCU_POINTER_INITIALIZER(9)
• kfree_rcu(9)
• kfree_rcu_mightsleep(9)
• kfree_rcu_nolock(9)
• rcu_head_init(9)
• rcu_head_after_call_rcu(9)

like, that's the whole RCU friend group right there 🫶 go read them all, iykyk 🧚

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okay that's the page!! sourced from ./include/linux, dated October 2026, and you already know the manual name — cond_resched_tasks_rcu_qs(9) 💀 byeee bestie, go report some quiescent states 💖✨🎀