diff options
Diffstat (limited to 'Config.in')
| -rw-r--r-- | Config.in | 367 |
1 files changed, 250 insertions, 117 deletions
@@ -304,148 +304,281 @@ menu "Global build settings" # CGROUP support symbols # - config KERNEL_FREEZER - bool - default y if KERNEL_CGROUP_FREEZER - depends on KERNEL_CGROUPS - - config KERNEL_CGROUP_FREEZER - bool - depends on KERNEL_CGROUPS - - config KERNEL_CGROUP_DEVICE - bool - depends on KERNEL_CGROUPS - - config KERNEL_CPUSETS - bool - default y if KERNEL_CGROUP_CPUACCT - depends on KERNEL_CGROUPS - - config KERNEL_PROC_PID_CPUSET - bool - default y if KERNEL_CGROUP_CPUACCT - depends on KERNEL_CGROUPS - - config KERNEL_CGROUP_CPUACCT - bool - depends on KERNEL_CGROUPS - - config KERNEL_RESOURCE_COUNTERS - bool - default y if KERNEL_CGROUP_MEM_RES_CTLR - depends on KERNEL_CGROUPS - - config KERNEL_CGROUP_MEM_RES_CTLR - bool - depends on KERNEL_CGROUPS + config KERNEL_CGROUPS + bool "Enable kernel cgroups" + default n - config KERNEL_CGROUP_MEM_RES_CTLR_SWAP - bool - depends on KERNEL_CGROUPS + if KERNEL_CGROUPS - config KERNEL_CGROUP_MEM_RES_CTLR_SWAP_ENABLED - bool - depends on KERNEL_CGROUPS + config KERNEL_CGROUP_DEBUG + bool "Example debug cgroup subsystem" + default n + help + This option enables a simple cgroup subsystem that + exports useful debugging information about the cgroups + framework. - config KERNEL_CGROUP_MEM_RES_CTLR_KMEM - bool - depends on KERNEL_CGROUPS + config KERNEL_FREEZER + bool + default y if KERNEL_CGROUP_FREEZER - config KERNEL_CGROUP_PERF - bool - depends on KERNEL_CGROUPS + config KERNEL_CGROUP_FREEZER + bool "Freezer cgroup subsystem" + default n + help + Provides a way to freeze and unfreeze all tasks in a + cgroup. - config KERNEL_CFS_BANDWIDTH - bool - default y if KERNEL_FAIR_GROUP_SCHED - depends on KERNEL_CGROUP_SCHED + config KERNEL_CGROUP_DEVICE + bool "Device controller for cgroups" + default y + help + Provides a cgroup implementing whitelists for devices which + a process in the cgroup can mknod or open. - config KERNEL_FAIR_GROUP_SCHED - bool - default y if KERNEL_CGROUP_SCHED - depends on KERNEL_CGROUP_SCHED + config KERNEL_CPUSETS + bool "Cpuset support" + default n + help + This option will let you create and manage CPUSETs which + allow dynamically partitioning a system into sets of CPUs and + Memory Nodes and assigning tasks to run only within those sets. + This is primarily useful on large SMP or NUMA systems. + + config KERNEL_PROC_PID_CPUSET + bool "Include legacy /proc/<pid>/cpuset file" + default n + depends on KERNEL_CPUSETS + + config KERNEL_CGROUP_CPUACCT + bool "Simple CPU accounting cgroup subsystem" + default n + help + Provides a simple Resource Controller for monitoring the + total CPU consumed by the tasks in a cgroup. - config KERNEL_RT_GROUP_SCHED - bool - default y if KERNEL_CGROUP_SCHED - depends on KERNEL_CGROUP_SCHED + config KERNEL_RESOURCE_COUNTERS + bool "Resource counters" + default n + help + This option enables controller independent resource accounting + infrastructure that works with cgroups. - config KERNEL_CGROUP_SCHED - bool - depends on KERNEL_CGROUPS + config KERNEL_MM_OWNER + bool + default y if KERNEL_MEMCG - config KERNEL_NET_CLS_CGROUP - bool - depends on KERNEL_CGROUPS + config KERNEL_MEMCG + bool "Memory Resource Controller for Control Groups" + default n + depends on KERNEL_RESOURCE_COUNTERS + help + Provides a memory resource controller that manages both anonymous + memory and page cache. (See Documentation/cgroups/memory.txt) + + Note that setting this option increases fixed memory overhead + associated with each page of memory in the system. By this, + 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory + usage tracking struct at boot. Total amount of this is printed out + at boot. + + Only enable when you're ok with these trade offs and really + sure you need the memory resource controller. Even when you enable + this, you can set "cgroup_disable=memory" at your boot option to + disable memory resource controller and you can avoid overheads. + (and lose benefits of memory resource controller) + + This config option also selects MM_OWNER config option, which + could in turn add some fork/exit overhead. + + config KERNEL_MEMCG_SWAP + bool "Memory Resource Controller Swap Extension" + default n + depends on KERNEL_MEMCG + help + Add swap management feature to memory resource controller. When you + enable this, you can limit mem+swap usage per cgroup. In other words, + when you disable this, memory resource controller has no cares to + usage of swap...a process can exhaust all of the swap. This extension + is useful when you want to avoid exhaustion swap but this itself + adds more overheads and consumes memory for remembering information. + Especially if you use 32bit system or small memory system, please + be careful about enabling this. When memory resource controller + is disabled by boot option, this will be automatically disabled and + there will be no overhead from this. Even when you set this config=y, + if boot option "swapaccount=0" is set, swap will not be accounted. + Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page + size is 4096bytes, 512k per 1Gbytes of swap. + + config KERNEL_MEMCG_SWAP_ENABLED + bool "Memory Resource Controller Swap Extension enabled by default" + default n + depends on KERNEL_MEMCG_SWAP + help + Memory Resource Controller Swap Extension comes with its price in + a bigger memory consumption. General purpose distribution kernels + which want to enable the feature but keep it disabled by default + and let the user enable it by swapaccount boot command line + parameter should have this option unselected. + For those who want to have the feature enabled by default should + select this option (if, for some reason, they need to disable it + then swapaccount=0 does the trick). + + + config KERNEL_MEMCG_KMEM + bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)" + default n + depends on KERNEL_MEMCG + help + The Kernel Memory extension for Memory Resource Controller can limit + the amount of memory used by kernel objects in the system. Those are + fundamentally different from the entities handled by the standard + Memory Controller, which are page-based, and can be swapped. Users of + the kmem extension can use it to guarantee that no group of processes + will ever exhaust kernel resources alone. + + config KERNEL_PERF_EVENTS + bool + default y if KERNEL_CGROUP_PERF + + config KERNEL_CGROUP_PERF + bool "Enable perf_event per-cpu per-container group (cgroup) monitoring" + default n + help + This option extends the per-cpu mode to restrict monitoring to + threads which belong to the cgroup specified and run on the + designated cpu. - config KERNEL_NETPRIO_CGROUP - bool - depends on KERNEL_CGROUPS + menuconfig KERNEL_CGROUP_SCHED + bool "Group CPU scheduler" + default n + help + This feature lets CPU scheduler recognize task groups and control CPU + bandwidth allocation to such task groups. It uses cgroups to group + tasks. + + if KERNEL_CGROUP_SCHED + + config KERNEL_FAIR_GROUP_SCHED + bool "Group scheduling for SCHED_OTHER" + default n + + config KERNEL_CFS_BANDWIDTH + bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED" + default n + depends on KERNEL_FAIR_GROUP_SCHED + help + This option allows users to define CPU bandwidth rates (limits) for + tasks running within the fair group scheduler. Groups with no limit + set are considered to be unconstrained and will run with no + restriction. + See tip/Documentation/scheduler/sched-bwc.txt for more information. + + config KERNEL_RT_GROUP_SCHED + bool "Group scheduling for SCHED_RR/FIFO" + default n + help + This feature lets you explicitly allocate real CPU bandwidth + to task groups. If enabled, it will also make it impossible to + schedule realtime tasks for non-root users until you allocate + realtime bandwidth for them. + + endif + + config KERNEL_BLK_CGROUP + bool "Block IO controller" + default y + help + 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 + CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set + CONFIG_BLK_DEV_THROTTLING=y. + + config KERNEL_DEBUG_BLK_CGROUP + bool "Enable Block IO controller debugging" + default n + depends on KERNEL_BLK_CGROUP + help + Enable some debugging help. Currently it exports additional stat + files in a cgroup which can be useful for debugging. - config KERNEL_BLK_CGROUP - bool - depends on KERNEL_CGROUPS + config KERNEL_NET_CLS_CGROUP + bool "Control Group Classifier" + default y - config KERNEL_DEBUG_BLK_CGROUP - bool - default n if KERNEL_CGROUPS - depends on KERNEL_CGROUPS + config KERNEL_NETPRIO_CGROUP + bool "Network priority cgroup" + default y - config KERNEL_CGROUPS - bool "Enable kernel cgroups" - default n - select KERNEL_CGROUP_FREEZER - select KERNEL_CGROUP_DEVICE - select KERNEL_CGROUP_CPUACCT - select KERNEL_CGROUP_MEM_RES_CTLR - select KERNEL_CGROUP_MEM_RES_CTLR_SWAP - select KERNEL_CGROUP_MEM_RES_CTLR_SWAP_ENABLED - select KERNEL_CGROUP_MEM_RES_CTLR_KMEM - select KERNEL_CGROUP_PERF - select KERNEL_CGROUP_SCHED - select KERNEL_NET_CLS_CGROUP - select KERNEL_NETPRIO_CGROUP - select KERNEL_BLK_CGROUP + endif # # Namespace support symbols # - config KERNEL_UTS_NS - bool - depends on KERNEL_NAMESPACES + config KERNEL_NAMESPACES + bool "Enable kernel namespaces" + default n - config KERNEL_IPC_NS - bool - depends on KERNEL_NAMESPACES + if KERNEL_NAMESPACES - config KERNEL_USER_NS - bool - depends on KERNEL_NAMESPACES + config KERNEL_UTS_NS + bool "UTS namespace" + default y + help + In this namespace tasks see different info provided + with the uname() system call - config KERNEL_PID_NS - bool - depends on KERNEL_NAMESPACES + config KERNEL_IPC_NS + bool "IPC namespace" + default y + help + In this namespace tasks work with IPC ids which correspond to + different IPC objects in different namespaces. - config KERNEL_NET_NS - bool - depends on KERNEL_NAMESPACES + config KERNEL_USER_NS + bool "User namespace (EXPERIMENTAL)" + default y + help + This allows containers, i.e. vservers, to use user namespaces + to provide different user info for different servers. - config KERNEL_DEVPTS_MULTIPLE_INSTANCES - bool - depends on KERNEL_NAMESPACES + config KERNEL_PID_NS + bool "PID Namespaces" + default y + help + Support process id namespaces. This allows having multiple + processes with the same pid as long as they are in different + pid namespaces. This is a building block of containers. - config KERNEL_NAMESPACES - bool "Enable kernel namespaces" - default n - select KERNEL_UTS_NS - select KERNEL_IPC_NS - select KERNEL_USER_NS - select KERNEL_PID_NS - select KERNEL_NET_NS - select KERNEL_DEVPTS_MULTIPLE_INSTANCES + config KERNEL_NET_NS + bool "Network namespace" + default y + help + Allow user space to create what appear to be multiple instances + of the network stack. + + config KERNEL_DEVPTS_MULTIPLE_INSTANCES + bool "Support multiple instances of devpts" + default y + help + Enable support for multiple instances of devpts filesystem. + If you want to have isolated PTY namespaces (eg: in containers), + say Y here. Otherwise, say N. If enabled, each mount of devpts + filesystem with the '-o newinstance' option will create an + independent PTY namespace. + endif comment "Package build options" |