CONFIG_BLK_CGROUP: IO controller

General informations

The Linux kernel configuration item CONFIG_BLK_CGROUP has multiple definitions:

IO controller found in init/Kconfig

The configuration item CONFIG_BLK_CGROUP:

• prompt: IO controller
• type: bool
• depends on: CONFIG_BLOCK
• defined in init/Kconfig
• found in Linux kernels: 4.5–4.20, 5.0–5.19, 6.0–6.12
• modules built: blk-cgroup, blk-cgroup

Help text

Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies.

Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) to such task groups. It is also used by bio throttling logic in block layer to implement upper limit in IO rates on a device.

This option only enables generic Block IO controller infrastructure. One needs to also enable actual IO controlling logic/policy. For enabling proportional weight division of disk bandwidth in CFQ, set BFQ_GROUP_IOSCHED=y; for enabling throttling policy, set BLK_DEV_THROTTLING=y.

See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information.

Block IO controller found in init/Kconfig

The configuration item CONFIG_BLK_CGROUP:

• prompt: Block IO controller
• type: bool
• depends on: CONFIG_BLOCK
• defined in init/Kconfig
• found in Linux kernels: 3.5–3.19, 4.0–4.4
• modules built: blk-cgroup, blk-cgroup

Help text

Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies.

Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) to such task groups. It is also used by bio throttling logic in block layer to implement upper limit in IO rates on a device.

This option only enables generic Block IO controller infrastructure. One needs to also enable actual IO controlling logic/policy. For enabling proportional weight division of disk bandwidth in CFQ, set CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set BLK_DEV_THROTTLING=y.

See Documentation/cgroups/blkio-controller.txt for more information.

Block IO controller found in init/Kconfig

The configuration item CONFIG_BLK_CGROUP:

• prompt: Block IO controller
• type: tristate
• depends on: CONFIG_BLOCK
• defined in init/Kconfig
• found in Linux kernels: 2.6.35–2.6.39, 3.0–3.4
• modules built: blk-cgroup, blk-cgroup

Help text

Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies.

Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) to such task groups. It is also used by bio throttling logic in block layer to implement upper limit in IO rates on a device.

This option only enables generic Block IO controller infrastructure. One needs to also enable actual IO controlling logic/policy. For enabling proportional weight division of disk bandwidth in CFQ, set CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set BLK_DEV_THROTTLING=y.

See Documentation/cgroups/blkio-controller.txt for more information.

Block cgroup support found in block/Kconfig

The configuration item CONFIG_BLK_CGROUP:

• prompt: Block cgroup support
• type: tristate
• depends on: ( CONFIG_CGROUPS ) && ( CONFIG_CFQ_GROUP_IOSCHED )
• defined in block/Kconfig
• found in Linux kernels: 2.6.34
• modules built: blk-cgroup, blk-cgroup

Help text

Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies.

Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) to such task groups.

found in block/Kconfig

The configuration item CONFIG_BLK_CGROUP:

• prompt:
• type: bool
• depends on: CONFIG_CGROUPS
• defined in block/Kconfig
• found in Linux kernels: 2.6.33
• modules built: blk-cgroup, blk-cgroup

Help text

Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies.

Currently, CFQ IO scheduler uses it to recognize task groups and control disk bandwidth allocation (proportional time slice allocation) to such task groups.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module blk-cgroup CONFIG_BLK_CGROUP : block/Kconfig : "Block cgroup support" # in 2.6.34
• lkddb module blk-cgroup CONFIG_BLK_CGROUP : init/Kconfig : "Block IO controller" # in 2.6.35–2.6.39, 3.0–3.4

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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