rdtgroup_mod...st_exclusive(9)

🦋 rdtgroup_mod...st_exclusive(9) 🦋

okay so first things first, bestie — this page lives in the Kernel API Manual, and the function we're stanning today is rdtgroup_mode_test_exclusive. it's giving "small function, big feelings". let's get into it 💅

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✨ NAME ✨

rdtgroup_mode_test_exclusive — the little vibe-check that tells you whether this resource group can be exclusive or not 🫶

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✨ SYNOPSIS ✨

bool rdtgroup_mode_test_exclusive (struct rdtgroup *rdtgrp );

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✨ ARGUMENTS ✨

• rdtgrp — the resource group, and no cap, it's identified through its closid. that's the whole personality of this parameter tbh 🎀

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✨ DESCRIPTION ✨

so like. an exclusive resource group means exactly what it sounds like — there should be no sharing of its allocated resources. none. zero. not even a little. it's main character energy, it doesn't do roommates 🌟

and at the moment this group is being considered for exclusive status, this test is what determines whether its current schemata actually supports that setting — by testing for overlap with all the other resource groups. literally checking if anybody else is squatting on its allocations 🙈

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✨ RETURN ✨

• true — slay, the resource group can be exclusive 💖
• false — nope, there's overlap with allocations of other resource groups, which means this resource group cannot be exclusive 😭 that's the whole tea.

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✨ SEE ALSO ✨

the kernel file is ./fs/resctrl/rdtgroup.c — go read it, iykyk 📖✨

and here's the whole friend group of related functions, all of them, none skipped, we don't do that here:

• closid_allocated(9)
• rdtgroup_mode_by_closid(9)
• rdtgroup_mode_str(9)
• rdtgroup_remove(9)
• rdtgroup_tasks_assigned(9)
• __rdtgroup_cbm_overlaps(9)
• rdtgroup_cbm_overlaps(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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lowkey a reminder that this is all documented behavior, so don't go inventing new semantics, bestie — the manpage is the source of truth 💀

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and that's the page!! 🎀 this one comes from the ./fs/resctrl crew, dated October 2026, and it's filed under rdtgroup_mod...st_exclusive(9) — okay bye, go read some kernel source, ily 🫶💜