cache_subtree_walk(9)

💖 cache_subtree_walk(9) — a Kernel API Manual moment 💖

okay so bestie, welcome to the cache_subtree_walk(9) page ✨ this whole thing lives in the Kernel API Manual and honestly it's giving "short but iconic" 🎀

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🌸 NAME 🌸

cache_subtree_walk — literally just Traverse the cache tree. that's the whole vibe 💅

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✨ SYNOPSIS ✨

int cache_subtree_walk (struct pcache_cache_subtree_walk_ctx *ctx );

one function, one argument, no cap 🫶

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🎀 ARGUMENTS 🎀

• ctx — a pointer to the context structure for the traversal, iykyk 🦋

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💅 DESCRIPTION 💅

so the way this works is: this function traverses the cache tree, starting from the specified node 🌈 and along the way it calls the appropriate callback functions, based on the relationships between the keys in the cache tree 🔥

it returns 0 on success, or a negative error code on failure 😭 that's it, that's the whole deal ✨

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👑 SEE ALSO 👑

Kernel file ./drivers/md/dm-pcache/cache_key.c plus all these absolute icons:

• cache_key_get(9)
• cache_key_destroy(9)
• cache_key_append(9)
• cache_subtree_search(9)
• fixup_overlap_tail(9)
• fixup_overlap_contain(9)
• fixup_overlap_contained(9)
• fixup_overlap_head(9)
• cache_key_insert(9)
• clean_fn(9)

go read them, they're all main character energy fr fr 🧚💜

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periodt 💀 that's the page, no notes 🍓

🦋 cute little sign-off: this one's from ./drivers/md/dm-pcache, dated October 2026, and yes it's still cache_subtree_walk(9) 💖 slay 🌟