scx_cgroup_task_migrating(9)

💅 scx_cgroup_task_migrating 💅

hiii bestie!! this is the Kernel API Manual page for scx_cgroup_task_migrating(9), and it's literally all about prepping a task for a cgroup migration ✨. yes, the name is long, but she's iconic, okay?

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🦋 NAME 🦋

• scx_cgroup_task_migrating — prepare a task for a cgroup migration. that's the assignment, and she ate 💖.

✨ SYNOPSIS ✨

s32 scx_cgroup_task_migrating (struct cgroup_task_migrate_ctx *ctx );

that's the whole signature, no cap. copy it exactly, bestie 🫶.

🎀 ARGUMENTS 🎀

• ctx — the migration that's being prepared. yep, that's the one and only argument 🌸.

💅 DESCRIPTION 💅

okay so here's the vibe: a task's sched must match its cgroup's owner. because of that, a migration that crosses a sched boundary re-homes the task once it's committed 🔥.

so you run the fallible part right here, before the migration commits: initialize the task for the destination sched. and if this gets rejected? the cgroup.procs write fails. that's the whole tea ☕😭.

bestie reminder: this is the fallible part, so it's doing real work before the migration commits — don't skip it 💀.

🌈 SEE ALSO 🌈

kernel file: ./kernel/sched/ext/sub.c — go read the extended universe, iykyk 👑.

• scx_skip_subtree_pre(9)
• scx_next_descendant_pre(9)
• scx_rescue_charge(9)
• scx_rescue_end(9)
• scx_rescue_keep(9)
• scx_rescue_accrue(9)
• scx_rescue_admit(9)
• scx_rescue_try_admit(9)
• scx_rescue_check_overload(9)
• scx_rescue_timerfn(9)
• scx_resolve_local_dsq(9)
• queue_sync_ecaps(9)
• scx_process_sync_ecaps(9)
• scx_unbypass_replay_ecaps(9)
• scx_discard_stale_ecaps_syncs(9)
• scx_rehome_task(9)
• scx_punt_task(9)
• scx_cgroup_claim_subtree(9)
• scx_cgroup_return_subtree(9)
• scx_cgroup_task_migrated(9)
• scx_cgroup_task_migrate_canceled(9)
• scx_bpf_sub_dispatch(9)
• scx_bpf_sub_grant(9)
• scx_bpf_sub_revoke(9)
• scx_bpf_sub_caps(9)
• scx_bpf_sub_kill_bstr(9)

and that's the list, periodt. mwah 💋

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source/version: ./kernel/sched/ext • date: October 2026 • page: scx_cgroup_task_migrating(9) — bye bestie, slay your migrations 🌟💖