cgroup: put controller Kconfig options in meaningful order
To make it easier to quickly find what's needed list the basic resource controllers of cgroup2 first - io, memory, cpu - while pushing the more exotic and/or legacy controllers to the bottom. tj: Removed spurious "&& CGROUPS" from CGROUP_PERF as suggested by Li. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Zefan Li <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>steinar/wifi_calib_4_9_kernel
Johannes Weiner
Tejun Heo
parent
a0166ec4b0
commit
6bf024e693
218
init/Kconfig
218
init/Kconfig
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@ -940,64 +940,6 @@ menuconfig CGROUPS
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if CGROUPS
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config CGROUP_DEBUG
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bool "Example controller"
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default n
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help
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This option enables a simple controller that exports
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debugging information about the cgroups framework.
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Say N.
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config CGROUP_FREEZER
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bool "Freezer controller"
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help
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Provides a way to freeze and unfreeze all tasks in a
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cgroup.
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config CGROUP_PIDS
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bool "PIDs controller"
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help
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Provides enforcement of process number limits in the scope of a
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cgroup. Any attempt to fork more processes than is allowed in the
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cgroup will fail. PIDs are fundamentally a global resource because it
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is fairly trivial to reach PID exhaustion before you reach even a
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conservative kmemcg limit. As a result, it is possible to grind a
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system to halt without being limited by other cgroup policies. The
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PIDs cgroup subsystem is designed to stop this from happening.
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It should be noted that organisational operations (such as attaching
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to a cgroup hierarchy will *not* be blocked by the PIDs subsystem),
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since the PIDs limit only affects a process's ability to fork, not to
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attach to a cgroup.
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config CGROUP_DEVICE
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bool "Device controller"
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help
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Provides a cgroup controller implementing whitelists for
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devices which a process in the cgroup can mknod or open.
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config CPUSETS
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bool "Cpuset controller"
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help
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This option will let you create and manage CPUSETs which
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allow dynamically partitioning a system into sets of CPUs and
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Memory Nodes and assigning tasks to run only within those sets.
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This is primarily useful on large SMP or NUMA systems.
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Say N if unsure.
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config PROC_PID_CPUSET
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bool "Include legacy /proc/<pid>/cpuset file"
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depends on CPUSETS
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default y
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config CGROUP_CPUACCT
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bool "Simple CPU accounting controller"
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help
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Provides a simple controller for monitoring the
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total CPU consumed by the tasks in a cgroup.
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config PAGE_COUNTER
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bool
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@ -1039,31 +981,40 @@ config MEMCG_KMEM
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the kmem extension can use it to guarantee that no group of processes
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will ever exhaust kernel resources alone.
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config CGROUP_HUGETLB
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bool "HugeTLB controller"
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depends on HUGETLB_PAGE
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select PAGE_COUNTER
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config BLK_CGROUP
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bool "IO controller"
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depends on BLOCK
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default n
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help
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Provides a cgroup controller for HugeTLB pages.
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When you enable this, you can put a per cgroup limit on HugeTLB usage.
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The limit is enforced during page fault. Since HugeTLB doesn't
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support page reclaim, enforcing the limit at page fault time implies
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that, the application will get SIGBUS signal if it tries to access
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HugeTLB pages beyond its limit. This requires the application to know
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beforehand how much HugeTLB pages it would require for its use. The
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control group is tracked in the third page lru pointer. This means
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that we cannot use the controller with huge page less than 3 pages.
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---help---
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Generic block IO controller cgroup interface. This is the common
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cgroup interface which should be used by various IO controlling
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policies.
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config CGROUP_PERF
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bool "Perf controller"
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depends on PERF_EVENTS && CGROUPS
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help
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This option extends the perf per-cpu mode to restrict monitoring
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to threads which belong to the cgroup specified and run on the
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designated cpu.
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Currently, CFQ IO scheduler uses it to recognize task groups and
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control disk bandwidth allocation (proportional time slice allocation)
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to such task groups. It is also used by bio throttling logic in
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block layer to implement upper limit in IO rates on a device.
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Say N if unsure.
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This option only enables generic Block IO controller infrastructure.
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One needs to also enable actual IO controlling logic/policy. For
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enabling proportional weight division of disk bandwidth in CFQ, set
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CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
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CONFIG_BLK_DEV_THROTTLING=y.
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See Documentation/cgroups/blkio-controller.txt for more information.
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config DEBUG_BLK_CGROUP
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bool "IO controller debugging"
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depends on BLK_CGROUP
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default n
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---help---
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Enable some debugging help. Currently it exports additional stat
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files in a cgroup which can be useful for debugging.
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config CGROUP_WRITEBACK
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bool
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depends on MEMCG && BLK_CGROUP
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default y
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menuconfig CGROUP_SCHED
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bool "CPU controller"
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@ -1103,41 +1054,90 @@ config RT_GROUP_SCHED
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endif #CGROUP_SCHED
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config BLK_CGROUP
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bool "IO controller"
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depends on BLOCK
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config CGROUP_PIDS
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bool "PIDs controller"
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help
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Provides enforcement of process number limits in the scope of a
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cgroup. Any attempt to fork more processes than is allowed in the
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cgroup will fail. PIDs are fundamentally a global resource because it
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is fairly trivial to reach PID exhaustion before you reach even a
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conservative kmemcg limit. As a result, it is possible to grind a
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system to halt without being limited by other cgroup policies. The
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PIDs cgroup subsystem is designed to stop this from happening.
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It should be noted that organisational operations (such as attaching
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to a cgroup hierarchy will *not* be blocked by the PIDs subsystem),
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since the PIDs limit only affects a process's ability to fork, not to
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attach to a cgroup.
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config CGROUP_FREEZER
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bool "Freezer controller"
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help
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Provides a way to freeze and unfreeze all tasks in a
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cgroup.
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config CGROUP_HUGETLB
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bool "HugeTLB controller"
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depends on HUGETLB_PAGE
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select PAGE_COUNTER
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default n
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---help---
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Generic block IO controller cgroup interface. This is the common
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cgroup interface which should be used by various IO controlling
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policies.
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help
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Provides a cgroup controller for HugeTLB pages.
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When you enable this, you can put a per cgroup limit on HugeTLB usage.
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The limit is enforced during page fault. Since HugeTLB doesn't
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support page reclaim, enforcing the limit at page fault time implies
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that, the application will get SIGBUS signal if it tries to access
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HugeTLB pages beyond its limit. This requires the application to know
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beforehand how much HugeTLB pages it would require for its use. The
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control group is tracked in the third page lru pointer. This means
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that we cannot use the controller with huge page less than 3 pages.
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Currently, CFQ IO scheduler uses it to recognize task groups and
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control disk bandwidth allocation (proportional time slice allocation)
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to such task groups. It is also used by bio throttling logic in
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block layer to implement upper limit in IO rates on a device.
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config CPUSETS
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bool "Cpuset controller"
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help
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This option will let you create and manage CPUSETs which
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allow dynamically partitioning a system into sets of CPUs and
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Memory Nodes and assigning tasks to run only within those sets.
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This is primarily useful on large SMP or NUMA systems.
|
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|
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This option only enables generic Block IO controller infrastructure.
|
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One needs to also enable actual IO controlling logic/policy. For
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enabling proportional weight division of disk bandwidth in CFQ, set
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CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
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CONFIG_BLK_DEV_THROTTLING=y.
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Say N if unsure.
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See Documentation/cgroups/blkio-controller.txt for more information.
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config DEBUG_BLK_CGROUP
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bool "IO controller debugging"
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depends on BLK_CGROUP
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default n
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---help---
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Enable some debugging help. Currently it exports additional stat
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files in a cgroup which can be useful for debugging.
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config CGROUP_WRITEBACK
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bool
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depends on MEMCG && BLK_CGROUP
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config PROC_PID_CPUSET
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bool "Include legacy /proc/<pid>/cpuset file"
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depends on CPUSETS
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default y
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config CGROUP_DEVICE
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bool "Device controller"
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help
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Provides a cgroup controller implementing whitelists for
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devices which a process in the cgroup can mknod or open.
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config CGROUP_CPUACCT
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bool "Simple CPU accounting controller"
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help
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Provides a simple controller for monitoring the
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total CPU consumed by the tasks in a cgroup.
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config CGROUP_PERF
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bool "Perf controller"
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depends on PERF_EVENTS
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help
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This option extends the perf per-cpu mode to restrict monitoring
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to threads which belong to the cgroup specified and run on the
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designated cpu.
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Say N if unsure.
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config CGROUP_DEBUG
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bool "Example controller"
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default n
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help
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This option enables a simple controller that exports
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debugging information about the cgroups framework.
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Say N.
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endif # CGROUPS
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config CHECKPOINT_RESTORE
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