LINEAR IO ITERATOR(9)

💅 Linear io iterator(9) 💅

okay bestie, welcome to the Kernel API Manual page for the linear io iterator. it's giving "legacy code we're politely waiting to retire" 😭 no cap.

🦋 Linear io iterator 🦋

real talk: this code should die in the not too near future 💀. best-case scenario? we could make io-mapping use memremap for all io memory, and have memremap implement a kmap_local functionality. then we could strip a huge amount of code. like, iconic cleanup energy ✨.

these linear io iterators are implemented to mimic old functionality, and they don't use kmap_local semantics at all internally 🙈. instead they use ioremap or friends, and at least on 32-bit they add global TLB flushes and points of failure. so yeah, that's the tea ☕.

heads up bestie: this is legacy mimicry, not kmap_local semantics — and on 32-bit it adds global TLB flushes and points of failure 💀

👀 SEE ALSO 👀

Kernel file: ./drivers/gpu/drm/ttm/ttm_resource.c

• ttm_resource_cursor_init(9)
• ttm_resource_cursor_fini(9)
• ttm_lru_bulk_move_init(9)
• ttm_lru_bulk_move_fini(9)
• ttm_lru_bulk_move_tail(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)
• 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)

mwah 💋 this page came from ./drivers/gpu/drm/ttm, dated October 2026, and it's literally the Linear io iterator(9) moment — bye bestie, go touch some kmap_local-adjacent grass 🌱🫶