tlb_remove_table_sync_rcu(9)

🌸 NAME 🌸

Okay so bestie, this is tlb_remove_table_sync_rcu — that's the (9) section, iykyk — from the Kernel API Manual. Its whole thing is synchronize with software page-table walkers ✨. That's the name, that's the vibe, that's the function. 💅

✨ SYNOPSIS ✨

void tlb_remove_table_sync_rcu (void );

Literally no arguments coming in, and void going out. Clean. 🫶

🫶 ARGUMENTS 🫶

• void — no arguments. Not a single one, bestie. It's giving "takes nothing, returns nothing." 🙈

💖 DESCRIPTION 💖

Okay so picture tlb_remove_table_sync_one, but make it use an RCU grace period instead of an IPI broadcast. That's this function. Use it in the slow paths where sleeping is acceptable — yes, sleeping, we love a function that's allowed to nap 😴.

Software/Lockless page-table walkers use local_irq_disable, and that's also an RCU read-side critical section. synchronize_rcu waits for all such sections, so you get the same guarantee as tlb_remove_table_sync_one, but without disrupting all CPUs with IPIs. Highkey iconic: same guarantee, less chaos. 🔥

🚨 Do not use this for freeing memory. Use RCU callbacks instead to avoid latency spikes. No cap, this one is serious. 💀

👑 SEE ALSO 👑

The kernel file is ./mm/mmu_gather.c, and the whole squad is:

• tlb_flush_rmaps(9)
• tlb_gather_mmu(9)
• tlb_gather_mmu_fullmm(9)
• tlb_gather_mmu_vma(9)
• tlb_finish_mmu(9)

Later, bestie 💋 This was tlb_remove_table_sync_rcu(9), sourced from ./mm, dated October 2026. Periodt. 🎀✨