rdtgroup_mode_by_closid(9)

✨ rdtgroup_mode_by_closid — the kernel API manual, bestie edition ✨

okay so this is a page from the Kernel API Manual (section 9, the kernel API girlies) and it's literally about finding out what mode a resource group is in when all you've got is its closid. Let's get into it 🫶

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🌸 NAME 🌸

rdtgroup_mode_by_closid — return mode of resource group with closid

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🦋 SYNOPSIS 🦋

enum rdtgrp_mode rdtgroup_mode_by_closid (int closid );

that's the whole signature, no cap. it hands you back an enum rdtgrp_mode and it takes one int closid 💅

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🎀 ARGUMENTS 🎀

• closid — the closid of the resource group, like, which group we're talking about. that's the one and only argument, she's lowkey carrying the whole function 💖

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👑 DESCRIPTION 👑

so here's the vibe: every single resource group is associated with a closid. iconic, we love a one-to-one relationship ✨

this function is how you query the mode of a resource group — you search for it using its closid, and boom, you've found your group. that's it, that's the whole job. main character energy fr fr 🌈

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🔥 RETURN 🔥

it returns the mode as an enum rdtgrp_mode of the resource group that has closid closid. so like, you give it the closid, it gives you back the mode. trade offer accepted 🤝💜

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🧚 SEE ALSO 🧚

the kernel file ./fs/resctrl/rdtgroup.c is where this lives, and here's the whole friend group it hangs out with:

• closid_allocated(9)
• rdtgroup_mode_str(9)
• rdtgroup_remove(9)
• rdtgroup_tasks_assigned(9)
• __rdtgroup_cbm_overlaps(9)
• rdtgroup_cbm_overlaps(9)
• rdtgroup_mode_test_exclusive(9)
• rdtgroup_cbm_to_size(9)
• rdtgroup_kn_mode_restrict(9)
• rdtgroup_kn_mode_restore(9)
• mon_get_kn_priv(9)
• mon_put_kn_priv(9)
• cbm_ensure_valid(9)
• mongrp_reparent(9)
• domain_setup_l3_mon_state(9)
• resctrl_exit(9)

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and that's the whole page, bestie 🌸💖 sign-off time: this one's filed under ./fs/resctrl, dated October 2026, and it goes by rdtgroup_mode_by_closid(9) — slay, go read the rest of the group chat 💅⭐