mirror of https://github.com/hak5/openwrt.git
627 lines
17 KiB
Plaintext
627 lines
17 KiB
Plaintext
# Copyright (C) 2006-2014 OpenWrt.org
|
|
#
|
|
# This is free software, licensed under the GNU General Public License v2.
|
|
# See /LICENSE for more information.
|
|
#
|
|
|
|
config KERNEL_BUILD_USER
|
|
string "Custom Kernel Build User Name"
|
|
default ""
|
|
help
|
|
Sets the Kernel build user string, which for example will be returned
|
|
by 'uname -a' on running systems.
|
|
If not set, uses system user at build time.
|
|
|
|
config KERNEL_BUILD_DOMAIN
|
|
string "Custom Kernel Build Domain Name"
|
|
default ""
|
|
help
|
|
Sets the Kernel build domain string, which for example will be
|
|
returned by 'uname -a' on running systems.
|
|
If not set, uses system hostname at build time.
|
|
|
|
config KERNEL_PRINTK
|
|
bool "Enable support for printk"
|
|
default y
|
|
|
|
config KERNEL_CRASHLOG
|
|
bool "Crash logging"
|
|
depends on !(arm || powerpc || sparc || TARGET_uml)
|
|
default y
|
|
|
|
config KERNEL_SWAP
|
|
bool "Support for paging of anonymous memory (swap)"
|
|
default y
|
|
|
|
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. Many common debugging facilities, such as
|
|
ftrace, require the existence of debugfs.
|
|
|
|
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"
|
|
depends on !TARGET_uml
|
|
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_FUNCTION_TRACER
|
|
bool "Function tracer"
|
|
depends on KERNEL_FTRACE
|
|
default n
|
|
|
|
config KERNEL_FUNCTION_GRAPH_TRACER
|
|
bool "Function graph tracer"
|
|
depends on KERNEL_FUNCTION_TRACER
|
|
default n
|
|
|
|
config KERNEL_DYNAMIC_FTRACE
|
|
bool "Enable/disable function tracing dynamically"
|
|
depends on KERNEL_FUNCTION_TRACER
|
|
default n
|
|
|
|
config KERNEL_FUNCTION_PROFILER
|
|
bool "Function profiler"
|
|
depends on KERNEL_FUNCTION_TRACER
|
|
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_DYNAMIC_DEBUG
|
|
bool "Compile the kernel with dynamic printk"
|
|
select KERNEL_DEBUG_FS
|
|
default n
|
|
help
|
|
Compiles debug level messages into the kernel, which would not
|
|
otherwise be available at runtime. These messages can then be
|
|
enabled/disabled based on various levels of scope - per source file,
|
|
function, module, format string, and line number. This mechanism
|
|
implicitly compiles in all pr_debug() and dev_dbg() calls, which
|
|
enlarges the kernel text size by about 2%.
|
|
|
|
config KERNEL_EARLY_PRINTK
|
|
bool "Compile the kernel with early printk"
|
|
default y if TARGET_bcm53xx
|
|
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_KPROBES
|
|
bool "Compile the kernel with kprobes support"
|
|
default n
|
|
select KERNEL_FTRACE
|
|
select KERNEL_PERF_EVENTS
|
|
help
|
|
Compiles the kernel with KPROBES support, which allows you to trap
|
|
at almost any kernel address and execute a callback function.
|
|
register_kprobe() establishes a probepoint and specifies the
|
|
callback. Kprobes is useful for kernel debugging, non-intrusive
|
|
instrumentation and testing.
|
|
If in doubt, say "N".
|
|
|
|
config KERNEL_KPROBE_EVENT
|
|
bool
|
|
default y if KERNEL_KPROBES
|
|
|
|
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_FHANDLE
|
|
bool "Compile the kernel with support for fhandle syscalls"
|
|
default n
|
|
|
|
config KERNEL_FANOTIFY
|
|
bool "Compile the kernel with modern file notification support"
|
|
default n
|
|
|
|
config KERNEL_BLK_DEV_BSG
|
|
bool "Compile the kernel with SCSI generic v4 support for any block device"
|
|
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_SLUB_DEBUG
|
|
bool
|
|
|
|
config KERNEL_SLUB_DEBUG_ON
|
|
bool
|
|
|
|
config KERNEL_SLABINFO
|
|
select KERNEL_SLUB_DEBUG
|
|
select KERNEL_SLUB_DEBUG_ON
|
|
bool "Enable /proc slab debug info"
|
|
|
|
config KERNEL_PROC_PAGE_MONITOR
|
|
bool "Enable /proc page monitoring"
|
|
|
|
config KERNEL_RELAY
|
|
bool
|
|
|
|
config KERNEL_KEXEC
|
|
bool "Enable kexec support"
|
|
|
|
config USE_RFKILL
|
|
bool "Enable rfkill support"
|
|
default RFKILL_SUPPORT
|
|
|
|
config USE_SPARSE
|
|
bool "Enable sparse check during kernel build"
|
|
default n
|
|
|
|
config KERNEL_DEVTMPFS
|
|
bool "Compile the kernel with device tmpfs enabled"
|
|
default n
|
|
help
|
|
devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
|
|
devices nodes for all registered devices ti simplify boot, but leaves more
|
|
complex tasks to userspace (e.g. udev).
|
|
|
|
if KERNEL_DEVTMPFS
|
|
|
|
config KERNEL_DEVTMPFS_MOUNT
|
|
bool "Automatically mount devtmpfs after root filesystem is mounted"
|
|
default n
|
|
|
|
endif
|
|
|
|
#
|
|
# 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 y
|
|
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_CGROUP_PIDS
|
|
bool "PIDs cgroup subsystem"
|
|
default y
|
|
help
|
|
Provides enforcement of process number limits in the scope of a
|
|
cgroup.
|
|
|
|
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 || !LINUX_3_18
|
|
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 tradeoffs 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
|
|
(but 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.
|
|
|
|
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"
|
|
select KERNEL_PERF_EVENTS
|
|
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.
|
|
|
|
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 y
|
|
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
|
|
|
|
config KERNEL_SECCOMP_FILTER
|
|
bool
|
|
default n
|
|
|
|
config KERNEL_SECCOMP
|
|
bool "Enable seccomp support"
|
|
depends on !(TARGET_uml)
|
|
select KERNEL_SECCOMP_FILTER
|
|
default n
|
|
help
|
|
Build kernel with support for seccomp.
|
|
|
|
#
|
|
# IPv6 configuration
|
|
#
|
|
|
|
config KERNEL_IPV6
|
|
def_bool IPV6
|
|
|
|
if KERNEL_IPV6
|
|
|
|
config KERNEL_IPV6_MULTIPLE_TABLES
|
|
def_bool y
|
|
|
|
config KERNEL_IPV6_SUBTREES
|
|
def_bool y
|
|
|
|
config KERNEL_IPV6_MROUTE
|
|
def_bool y
|
|
|
|
config KERNEL_IPV6_PIMSM_V2
|
|
def_bool n
|
|
|
|
endif
|
|
|
|
#
|
|
# NFS related symbols
|
|
#
|
|
config KERNEL_IP_PNP
|
|
bool "Compile the kernel with rootfs on NFS"
|
|
help
|
|
If you want to make your kernel boot off a NFS server as root
|
|
filesystem, select Y here.
|
|
|
|
if KERNEL_IP_PNP
|
|
|
|
config KERNEL_IP_PNP_DHCP
|
|
def_bool y
|
|
|
|
config KERNEL_IP_PNP_BOOTP
|
|
def_bool n
|
|
|
|
config KERNEL_IP_PNP_RARP
|
|
def_bool n
|
|
|
|
config KERNEL_NFS_FS
|
|
def_bool y
|
|
|
|
config KERNEL_NFS_V2
|
|
def_bool y
|
|
|
|
config KERNEL_NFS_V3
|
|
def_bool y
|
|
|
|
config KERNEL_ROOT_NFS
|
|
def_bool y
|
|
|
|
endif
|