cgroup_move_task(9)

NAME 💖

cgroup_move_task — move task to a different cgroup.

okay so bestie, welcome to the cgroup_move_task(9) page from the Kernel API Manual. this is literally the function that moves a task to a different cgroup. slay. 💅

SYNOPSIS ✨

void cgroup_move_task (struct task_struct *task , struct css_set *to );

it’s giving void, so no return value to catch — periodt. ✨

ARGUMENTS 🎀

• task — the task. like, the task being moved, bestie. 🫶
• to — the target css_set. the group it’s headed to. 🦋

DESCRIPTION 🌈

Move task to a new cgroup and safely migrate its associated stall state between the different groups. no cap, that’s the main character move. 🦋

This function acquires the task’s rq lock to lock out concurrent changes to the task’s scheduling state and — in case the task is running — concurrent changes to its stall state. highkey important: the lock is doing the “don’t touch that” work so things don’t get messy. 💅

bestie, this is kernel-level stuff — the rq lock part is literally there to lock out those concurrent changes, so don’t sleep on it. 😭

SEE ALSO 🌸

• Kernel file ./kernel/sched/psi.c
• psi_memstall_enter(9)
• psi_memstall_leave(9)

mwah 💋 this page lives under source/version ./kernel/sched, dated October 2026, and it’s still cgroup_move_task(9). bye bestie, go slay 🫶💖