ct_nmi_exit(9)

💅 ct_nmi_exit(9) — inform RCU of exit from NMI context 💅

Okay bestie, welcome to the ct_nmi_exit(9) page from the Kernel API Manual — short, sweet, and lowkey giving “tiny function, important paperwork.” ✨

✨ NAME ✨

ct_nmi_exit — inform RCU of exit from NMI context. 🦋

🌸 SYNOPSIS 🌸

void noinstr ct_nmi_exit (void );

🎀 ARGUMENTS 🎀

• void — no arguments, periodt. Like, she takes nothing. 💅

🧚 DESCRIPTION 🧚

When you’re returning from the outermost NMI handler that interrupted an RCU-idle period, this updates ct->state and ct->nmi_nesting so the RCU grace-period handling knows the CPU is back to being RCU-idle. No cap, that’s the whole vibe. 😌

🚨 Bestie heads-up: if you add or remove a call to ct_nmi_exit, be sure to test with CONFIG_RCU_EQS_DEBUG=y.

🌈 SEE ALSO 🌈

• Kernel file: ./kernel/context_tracking.c
• ct_nmi_enter(9)
• ct_idle_enter(9)
• ct_idle_exit(9)
• ct_irq_enter(9)
• ct_irq_exit(9)
• __ct_user_enter(9)
• user_enter_callable(9)
• __ct_user_exit(9)
• user_exit_callable(9)

Source/version: ./kernel · date: October 2026 — bye bestie, go touch some RCU-idle grass 🌱💖