ttm_lru_bulk_move_tail(9)

👑 ttm_lru_bulk_move_tail(9) — the Kernel API Manual glow-up ✨

okay so bestie, welcome to the ttm_lru_bulk_move_tail(9) page from the Kernel API Manual 💖 this one's a lil function in the TTM resource world and she's lowkey iconic, so let's get into it 🎀

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✨ NAME ✨

ttm_lru_bulk_move_tail — bulk move range of resources to the LRU tail 💅

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🌸 SYNOPSIS 🌸

void ttm_lru_bulk_move_tail (struct ttm_lru_bulk_move *bulk );

that's it, that's the whole vibe 🫶 void return, one pointer, very demure ✨

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🦋 ARGUMENTS 🦋

• bulk — the bulk move structure 💫 that's the whole thing, she's the star of the show 👑

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💜 DESCRIPTION 💜

so what she does is bulk move BOs to the LRU tail 🔥 like, a whole range of resources, all shuffled to the back of the line at once — no cap, that's the move 💅

⚠️ okay but hear me on this one: this is only valid to use when the driver makes sure that resource order never changes 😭 like if your driver is out there reordering stuff, this function is NOT the one, do not pass go 🚫

and the other big requirement, fr fr: it should be called with ttm_device.lru_lock held 🔒 like actually held, by you, before you call her. no lock, no love 🙈

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🌈 SEE ALSO 🌈

go peek at the kernel file first, it's giving source of truth 📂:

• ./drivers/gpu/drm/ttm/ttm_resource.c

and then the whole friend group 🫶:

• ttm_resource_cursor_init(9), ttm_resource_cursor_fini(9)
• ttm_lru_bulk_move_init(9), ttm_lru_bulk_move_fini(9)
• ttm_resource_init(9), ttm_resource_fini(9)
• ttm_resource_try_charge(9), ttm_resource_intersects(9), ttm_resource_compatible(9)
• ttm_resource_manager_init(9), ttm_resource_manager_usage(9), ttm_resource_manager_debug(9)
• ttm_resource_manager_first(9), ttm_resource_manager_next(9)
• ttm_lru_first_res_or_null(9)
• ttm_kmap_iter_iomap_init(9), Linear io iterator(9)
• ttm_kmap_iter_linear_io_init(9), ttm_kmap_iter_linear_io_fini(9)
• ttm_resource_manager_create_debugfs(9)
• ttm_resource_manager_dmem_reclaim(9)
• ttm_resource_manager_set_dmem_region(9)

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okay that's the page!! mwah 💋 this dropped from ./drivers/gpu/drm/ttm in October 2026, and it's literally titled ttm_lru_bulk_move_tail(9) — go forth and bulk move responsibly bestie 🌟💖