task_get_cgroup1(9)

💖 task_get_cgroup1(9) 💖

okay so welcome to the Kernel API Manual page for task_get_cgroup1 — bestie, this one is literally about acquiring the cgroup associated with a task inside one specific cgroup1 hierarchy. That cgroup1 hierarchy is identified by its hierarchy ID. no cap ✨

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🌸 NAME 🌸

task_get_cgroup1 — acquires the associated cgroup of a task within a specific cgroup1 hierarchy. The cgroup1 hierarchy is identified by its hierarchy ID. 💅

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🦋 SYNOPSIS 🦋

struct cgroup * task_get_cgroup1 (struct task_struct *tsk , int hierarchy_id );

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🎀 ARGUMENTS 🎀

• tsk — the target task (struct task_struct *). it's giving “which task are we checking?” energy 🫶
• hierarchy_id — the ID of a cgroup1 hierarchy (int). lowkey the key for the hierarchy you're asking about ✨

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🔥 DESCRIPTION 🔥

On success, the cgroup is returned. 🎉 On failure, ERR_PTR is returned — yep, that's the failure value, bestie, so don't sleep on it 😭 We limit it to cgroup1 only. periodt 💅

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🌈 SEE ALSO 🌈

• Kernel file: ./kernel/cgroup/cgroup-v1.c 📁
• cgroup_attach_task_all(9)
• cgroup_transfer_tasks(9)
• cgroupstats_build(9)

go peek at these if you're doing the deeper cgroup1 lore, iykyk 🦋

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mwah 💋 — source ./kernel/cgroup, October 2026, for task_get_cgroup1(9) ✨