ttm_resource_try_charge(9)

💅 ttm_resource_try_charge(9) 💅

okay so bestie, welcome to the Kernel API Manual — this one's called ttm_resource_try_charge, and it's literally the bouncer at the door of the resource manager's cgroup pool 🎀

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✨ SYNOPSIS ✨

int ttm_resource_try_charge (struct ttm_buffer_object *bo , const struct
ttm_place *place , struct dmem_cgroup_pool_state **ret_pool , struct
dmem_cgroup_pool_state **ret_limit_pool );

like yes, it's four args, no we're not scared of it 💪

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🌸 ARGUMENTS 🌸

• bo — the buffer that's getting its allocation charged, i.e. the main character of this whole operation 👑
• place — where we're attempting to put the allocation, the vibe check location if u will
• ret_pool — on charge success, this is the pool that got charged. icon. ate. no crumbs 🍓
• ret_limit_pool — on charge failure, this is the pool that's responsible for the failure. snitch behavior but make it useful 💀

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🦋 DESCRIPTION 🦋

okay so here's the tea: you should use this to charge cgroups before attempting resource allocation. like, before. not after. before. periodt 💅

when the charging succeeds, the value of ret_pool should be passed to ttm_resource_alloc. that's it, that's the handoff, pass the pool along like a note in class bestie 🫶

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⭐ RETURN ⭐

• 0 on charge success 🎉
• negative errno on failure 😭

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🔥 SEE ALSO 🔥

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

and the whole friend group, in order:

• 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_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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and that's the whole page babes 💖 this came at you from ./drivers/gpu/drm/ttm, dated October 2026 — mwah, go charge those cgroups responsibly 🧚✨