Control Group v2

Basic Operations

Mounting

nsdelegate

favordynmods

memory_localevents

memory_recursiveprot

memory_hugetlb_accounting

pids_localevents

Organizing Processes and Threads

Processes

Threads

Controlling Controllers

Enabling and Disabling

Top-down Constraint

No Internal Process Constraint

Delegation

Model of Delegation

Delegation Containment

Guidelines

Organize Once and Control

Avoid Name Collisions

Interface Files

Core Interface Files

cgroup.type

cgroup.procs

cgroup.threads

cgroup.controllers

cgroup.subtree_control

cgroup.events

populated

frozen

cgroup.max.descendants

cgroup.max.depth

cgroup.stat

nr_descendants

nr_dying_descendants

nr_subsys_<cgroup_subsys>

nr_dying_subsys_<cgroup_subsys>

cgroup.freeze

cgroup.kill

cgroup.pressure

irq.pressure

Controllers

CPU

CPU Interface Files

cpu.stat

cpu.weight

cpu.weight.nice

cpu.max

cpu.max.burst

cpu.pressure

cpu.uclamp.min

cpu.uclamp.max

cpu.idle

Memory

Memory Interface Files

memory.current

memory.min

memory.low

memory.high

memory.max

memory.reclaim

memory.peak

memory.oom.group

memory.events

low

high

max

oom

oom_kill

oom_group_kill

memory.events.local

memory.stat

anon

file

kernel

kernel_stack

pagetables

sec_pagetables

percpu

sock

vmalloc

shmem

zswap

zswapped

file_mapped

file_dirty

file_writeback

swapcached

anon_thp

file_thp

shmem_thp

inactive_anon,

slab_reclaimable

slab_unreclaimable

slab

workingset_refault_anon

workingset_refault_file

workingset_activate_anon

workingset_activate_file

workingset_restore_anon

workingset_restore_file

workingset_nodereclaim

pswpin

pswpout

pgscan

pgsteal

pgscan_kswapd

pgscan_direct

pgscan_khugepaged

pgscan_proactive

pgsteal_kswapd

pgsteal_direct

pgsteal_khugepaged

pgsteal_proactive

pgfault

pgmajfault

pgrefill

pgactivate

pgdeactivate

pglazyfree

pglazyfreed

swpin_zero

swpout_zero

zswpin

zswpout

zswpwb

thp_fault_alloc

thp_collapse_alloc

thp_swpout

thp_swpout_fallback

numa_pages_migrated

numa_pte_updates

numa_hint_faults

pgdemote_kswapd

pgdemote_direct

pgdemote_khugepaged

pgdemote_proactive

hugetlb

memory.numa_stat

memory.swap.current

memory.swap.high

memory.swap.peak

memory.swap.max

memory.swap.events

high

max

fail

memory.zswap.current

memory.zswap.max

memory.zswap.writeback

memory.pressure

Usage Guidelines

Memory Ownership

IO

IO Interface Files

io.stat

io.cost.qos

io.cost.model

io.weight

io.max

io.pressure

Writeback

vm.dirty_background_ratio,

vm.dirty_background_bytes,

IO Latency

How IO Latency Throttling Works

IO Latency Interface Files

io.latency

io.stat

depth

avg_lat

win

IO Priority

no-change

promote-to-rt

restrict-to-be

idle

none-to-rt

PID

PID Interface Files

pids.max

pids.current

pids.peak

pids.events

max

pids.events.local

Cpuset

Cpuset Interface Files

cpuset.cpus

cpuset.cpus.effective

cpuset.mems

cpuset.mems.effective

cpuset.cpus.exclusive

cpuset.cpus.exclusive.effective

cpuset.cpus.isolated

cpuset.cpus.partition

RDMA

RDMA Interface Files

rdma.max

rdma.current

DMEM

DMEM Interface Files

dmem.max,

dmem.capacity

dmem.current

HugeTLB

HugeTLB Interface Files

hugetlb.<hugepagesize>.current

hugetlb.<hugepagesize>.max

hugetlb.<hugepagesize>.events

max

hugetlb.<hugepagesize>.events.local

hugetlb.<hugepagesize>.numa_stat

Misc

Misc Interface Files

misc.capacity

misc.current

misc.peak

misc.max

misc.events

max

misc.events.local

Migration and Ownership

Others

perf_event

Non-normative information

CPU controller root cgroup process behaviour

IO controller root cgroup process behaviour

Information on Kernel Programming

Filesystem Support for Writeback

wbc_init_bio

wbc_account_cgroup_owner

Issues with v1 and Rationales for v2

Controller Issues and Remedies

Memory