truncate_inode_pages_final(9)

💅 truncate_inode_pages_final(9) 💅

okay so bestie, you're reading the Kernel API Manual entry for truncate_inode_pages_final(9) — yes, the whole name is the title, we're not doing nicknames today 🎀

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✨ NAME ✨

truncate_inode_pages_final — literally truncate all the pages before the inode dies 💀

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🌸 SYNOPSIS 🌸

void truncate_inode_pages_final (struct address_space *mapping );

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🦋 ARGUMENTS 🦋

• mapping — the mapping you're about to truncate. that's it, that's the argument 🫶

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🔥 DESCRIPTION 🔥

so this one gets called under inode->i_rwsem, and that same lock is what serializes it. no sneaky concurrent vibes here, it's locked and loaded 🔒

filesystems have to use this in the .evict_inode path — like, non-negotiable, main character obligation energy — so they can inform the VM that this is the final truncate and the inode is about to go away 👋✨

ngl, "final" is doing a lot of work in that name — this is the goodbye truncate, the last one, the inode is leaving the group chat 😭

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👑 SEE ALSO 👑

• kernel file ./mm/truncate.c — go read the source, iykyk 📖
• folio_invalidate(9)
• mapping_evict_folio(9)
• truncate_inode_pages_range(9)
• truncate_inode_pages(9)
• mapping_try_invalidate(9)
• invalidate_mapping_pages(9)
• invalidate_inode_pages2_range(9)
• invalidate_inode_pages2(9)
• truncate_pagecache(9)
• truncate_setsize(9)
• pagecache_isize_extended(9)
• truncate_pagecache_range(9)

like, that's a whole friend group of truncate/invalidate functions and they all ate 💅

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🌈 that's the page !! brought to you by the fine folks over in ./mm, dated October 2026, filed under truncate_inode_pages_final(9) — slay, go free your inode's pages 🧚💖