pseudo_lock_region_init(9)

🌸 NAME 🌸

okay so welcome to the pseudo_lock_region_init(9) page from the Kernel API Manual, bestie 💖 this one is literally about initializing pseudo-lock region information, and it's giving very specific setup energy.

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🦋 SYNOPSIS 🦋

int pseudo_lock_region_init (struct pseudo_lock_region *plr );

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💅 ARGUMENTS 💅

• plr — the pseudo-lock region 🫶 this is the little region struct we're setting up.

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✨ DESCRIPTION ✨

so picture this: this function is called after the user already provided a schemata to be pseudo-locked. On entry, struct pseudo_lock_region is already initialized with the resource, domain, and capacity bitmask. From that data, this function deduces the info required for pseudo-locking and initializes struct pseudo_lock_region further. highkey important stuff 😌

the information it works out includes:

• size in bytes of the region to be pseudo-locked 📏
• cache line size, so we know the stride with which data needs to be accessed to be pseudo-locked 🧚
• a CPU associated with the cache instance on which the pseudo-locking flow can be executed 👑

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🔥 RETURN 🔥

0 on success, <0 on failure. A descriptive error will be written to the last_cmd_status buffer 😭 no cap, that's where the tea gets spilled.

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💜 SEE ALSO 💜

Kernel file ./fs/resctrl/pseudo_lock.c — and the whole SEE ALSO squad is:

• pseudo_lock_minor_get(9)
• pseudo_lock_minor_release(9)
• region_find_by_minor(9)
• struct pseudo_lock_pm_req(9)
• pseudo_lock_cstates_constrain(9)
• pseudo_lock_region_clear(9)
• pseudo_lock_init(9)
• pseudo_lock_region_alloc(9)
• pseudo_lock_free(9)
• rdtgroup_monitor_in_progress(9)
• rdtgroup_locksetup_user_restrict(9)
• rdtgroup_locksetup_user_restore(9)
• rdtgroup_locksetup_enter(9)
• rdtgroup_locksetup_exit(9)
• rdtgroup_cbm_overlaps_pseudo_locked(9)
• rdtgroup_pseudo_locked_in_hierarchy(9)
• pseudo_lock_measure_cycles(9)
• rdtgroup_pseudo_lock_create(9)
• rdtgroup_pseudo_lock_remove(9)

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made with 💖 from the source/version ./fs/resctrl, dated October 2026 — that's the cute little sign-off, bestie, bye! 🎀