dmem_cgroup_register_region(9)

💖 dmem_cgroup_register_region(9) 💖

okay bestie, so this is a page from the Kernel API Manual and it's literally about dmem_cgroup_register_region — yes that's a whole mouthful, iykyk 🫶 stay with me, it's actually slay.

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✨ NAME ✨

dmem_cgroup_register_region — registering a region for the dev cgroup, no cap 💅

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🦋 SYNOPSIS 🦋

struct dmem_cgroup_region * dmem_cgroup_register_region (const struct
dmem_cgroup_init *init , const char *fmt , ... );

like, that's the whole signature, copy it exactly bestie, don't freestyle it 🙈

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🌸 ARGUMENTS 🌸

• init — the init fam: initialization parameters for the region, periodt ✨
• fmt — the region parameters you're registering, okayurr 🎀
• ... — variable arguments, the lil extras, she's flexible like that 💅

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🧚 DESCRIPTION 🧚

so here's the vibe: this function registers a node in the dmem cgroup, using the name you gave it. not me being obsessed with naming things correctly 😭

the important part, bestie, is that after you call this function, the region can be used for allocations. like, that's the whole glow-up. register first, allocate after. main character energy only 👑🔥

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⭐ RETURN ⭐

• NULL or a struct on success 🫶
• PTR_ERR on failure 💀

that's it, that's the return, no extra lore, don't @ me.

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🌈 SEE ALSO 🌈

the kernel file is right here, iconic: ./kernel/cgroup/dmem.c

and the whole friend group, all of them, every single one, no skipping:

• dmem_cgroup_state_evict_valuable(9)
• dmem_cgroup_unregister_region(9)
• dmem_cgroup_pool_state_put(9)
• dmem_cgroup_uncharge(9)
• dmem_cgroup_try_charge(9)
• dmem_cgroup_below_min(9)
• dmem_cgroup_below_low(9)
• dmem_cgroup_get_common_ancestor(9)

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ok that's the whole page, bestie. go register your region. slay 💖

as for the boring paperwork at the bottom — that's ./kernel/cgroup, October 2026, and the page itself is dmem_cgroup_register_region(9). mwah, bye 🎀✨