rhltable_walk_enter(9)

✨ NAME ✨

Okay bestie, welcome to the Kernel API Manual — this page is all about rhltable_walk_enter, and it does exactly one iconic job: Initialise an iterator. That's it. That's the whole vibe. 💅

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🌸 SYNOPSIS 🌸

void rhltable_walk_enter (struct rhltable *hlt , struct rhashtable_iter
*iter );

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🎀 ARGUMENTS 🎀

• hlt — the table you're walking over. That's the main character table, periodt. 👑
• iter — the Hash table Iterator. This is your little walker buddy. 🦋

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💖 DESCRIPTION 💖

So what does this function actually do? It prepares a hash table walk — like setting up the group chat before the gossip starts. 💅

⚠️ Important caveat time, bestie: if you restart a walk after rhashtable_walk_stop, you may see the same object twice. Not a glitch, just the rules. 😭

⚠️ Also, you may miss objects if there are removals in between rhashtable_walk_stop and the next call to rhashtable_walk_start. So yeah, removals during that gap can make you miss stuff — no cap. fr fr.

For a completely stable walk, you should construct your own data structure outside the hash table. That's the move if you need that totally steady, no-surprises energy. ✨

This function may be called from any process context, including non-preemptable context, but cannot be called from softirq or hardirq context. So process context? Slay. Softirq/hardirq? Not today, bestie. 🙈

You must call rhashtable_walk_exit after this function returns. Not optional, not a suggestion — it's giving mandatory cleanup era. 🧹💖

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🌈 SEE ALSO 🌈

Okay the SEE ALSO section is lowkey huge, so here's the full squad — every single reference, no skips: 💜

• Kernel file ./include/linux/rhashtable.h struct bucket_table(9)
• rht_grow_above_75(9)
• rht_shrink_below_30(9)
• rht_grow_above_100(9)
• rht_grow_above_max(9)
• rht_for_each_from(9)
• rht_for_each(9)
• rht_for_each_entry_from(9)
• rht_for_each_entry(9)
• rht_for_each_entry_safe(9)
• rht_for_each_rcu_from(9)
• rht_for_each_rcu(9)
• rht_for_each_entry_rcu_from(9)
• rht_for_each_entry_rcu(9)
• rhl_for_each_rcu(9)
• rhl_for_each_entry_rcu(9)
• rhashtable_lookup(9)
• rhashtable_lookup_fast(9)
• rhltable_lookup(9)
• rhashtable_insert_fast(9)
• rhltable_insert_key(9)
• rhltable_insert(9)
• rhashtable_lookup_insert_fast(9)
• rhashtable_lookup_get_insert_fast(9)
• rhashtable_lookup_insert_key(9)
• rhashtable_lookup_get_insert_key(9)
• rhashtable_remove_fast(9)
• rhltable_remove(9)
• rhashtable_replace_fast(9)
• rhltable_free_and_destroy(9)

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xoxo, your local hash-table hype girl 💅 — source/version: ./include/linux, date: October 2026, page: rhltable_walk_enter(9) 🎀✨