- config KERNEL_DEBUG_FS
- bool "Compile the kernel with Debug FileSystem enabled"
- default y
- help
- debugfs is a virtual file system that kernel developers use to put
- debugging files into. Enable this option to be able to read and
- write to these files.
-
- config KERNEL_PERF_EVENTS
- bool
- default n
-
- config KERNEL_PROFILING
- bool "Compile the kernel with profiling enabled"
- default n
- select KERNEL_PERF_EVENTS
- help
- Enable the extended profiling support mechanisms used by profilers such
- as OProfile.
-
- config KERNEL_KALLSYMS
- bool "Compile the kernel with symbol table information"
- default y
- help
- This will give you more information in stack traces from kernel oopses
-
- config KERNEL_FTRACE
- bool "Compile the kernel with tracing support"
- default n
-
- config KERNEL_FTRACE_SYSCALLS
- bool "Trace system calls"
- depends on KERNEL_FTRACE
- default n
-
- config KERNEL_ENABLE_DEFAULT_TRACERS
- bool "Trace process context switches and events"
- depends on KERNEL_FTRACE
- default n
-
- config KERNEL_DEBUG_KERNEL
- bool
- default n
-
- config KERNEL_DEBUG_INFO
- bool "Compile the kernel with debug information"
- default y
- select KERNEL_DEBUG_KERNEL
- help
- This will compile your kernel and modules with debug information.
-
- config KERNEL_DEBUG_LL_UART_NONE
- bool
- default n
- depends on arm
-
- config KERNEL_DEBUG_LL
- bool
- default n
- depends on arm
- select KERNEL_DEBUG_LL_UART_NONE
- help
- ARM low level debugging
-
- config KERNEL_EARLY_PRINTK
- bool "Compile the kernel with early printk"
- default n
- depends on arm
- select KERNEL_DEBUG_KERNEL
- select KERNEL_DEBUG_LL if arm
- help
- Compile the kernel with early printk support.
- This is only useful for debugging purposes to send messages
- over the serial console in early boot.
- Enable this to debug early boot problems.
-
- config KERNEL_AIO
- bool "Compile the kernel with asynchronous IO support"
- default n
-
- config KERNEL_DIRECT_IO
- bool "Compile the kernel with direct IO support"
- default n
-
- config KERNEL_MAGIC_SYSRQ
- bool "Compile the kernel with SysRq support"
- default y
-
- config KERNEL_COREDUMP
- bool
-
- config KERNEL_ELF_CORE
- bool "Enable process core dump support"
- select KERNEL_COREDUMP
- default y
-
- config KERNEL_PROVE_LOCKING
- bool "Enable kernel lock checking"
- select KERNEL_DEBUG_KERNEL
- default n
-
- config KERNEL_PRINTK_TIME
- bool "Enable printk timestamps"
- default y
-
- config KERNEL_RELAY
- bool
-
- config KERNEL_KEXEC
- bool "Enable kexec support"
-
- config USE_RFKILL
- bool "Enable rfkill support"
- default RFKILL_SUPPORT
-
- #
- # CGROUP support symbols
- #
-
- config KERNEL_CGROUPS
- bool "Enable kernel cgroups"
- default n
-
- if 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_FREEZER
- bool
- default y if KERNEL_CGROUP_FREEZER
-
- 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_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_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_RESOURCE_COUNTERS
- bool "Resource counters"
- default n
- help
- This option enables controller independent resource accounting
- infrastructure that works with cgroups.
-
- config KERNEL_MM_OWNER
- bool
- default y if KERNEL_MEMCG
-
- 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_CGROUP_PERF
- bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
- default n
- select KERNEL_PERF_EVENTS
- 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.
-
- 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_NET_CLS_CGROUP
- bool "Control Group Classifier"
- default y
-
- config KERNEL_NETPRIO_CGROUP
- bool "Network priority cgroup"
- default y
-
- endif
-
- #
- # Namespace support symbols
- #
-
- config KERNEL_NAMESPACES
- bool "Enable kernel namespaces"
- default n
-
- if 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_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_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_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_NET_NS
- bool "Network namespace"
- default y
- help
- Allow user space to create what appear to be multiple instances
- of the network stack.
-
- endif
-
- #
- # LXC related symbols
- #
-
- config KERNEL_LXC_MISC
- bool "Enable miscellaneous LXC related options"
- default n
-
- if KERNEL_LXC_MISC
-
- 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.
-
- config KERNEL_POSIX_MQUEUE
- bool "POSIX Message Queues"
- default n
- help
- POSIX variant of message queues is a part of IPC. In POSIX message
- queues every message has a priority which decides about succession
- of receiving it by a process. If you want to compile and run
- programs written e.g. for Solaris with use of its POSIX message
- queues (functions mq_*) say Y here.
-
- POSIX message queues are visible as a filesystem called 'mqueue'
- and can be mounted somewhere if you want to do filesystem
- operations on message queues.
-
- endif
projects / openwrt / svn-archive / archive.git / blobdiff