+config ARCH
+ string
+ option env="ARCH"
+
+config KERNELVERSION
+ string
+ option env="KERNELVERSION"
+
config DEFCONFIG_LIST
string
depends on !UML
Say N if unsure.
-config USER_NS
- bool "User Namespaces (EXPERIMENTAL)"
- default n
- depends on EXPERIMENTAL
- help
- Support user namespaces. This allows containers, i.e.
- vservers, to use user namespaces to provide different
- user info for different servers. If unsure, say N.
-
-config PID_NS
- bool "PID Namespaces (EXPERIMENTAL)"
- default n
- depends on EXPERIMENTAL
- help
- Suport process id namespaces. This allows having multiple
- process with the same pid as long as they are in different
- pid namespaces. This is a building block of containers.
-
- Unless you want to work with an experimental feature
- say N here.
-
config AUDIT
bool "Auditing support"
depends on NET
config AUDITSYSCALL
bool "Enable system-call auditing support"
- depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64)
+ depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64|| SUPERH)
default y if SECURITY_SELINUX
help
Enable low-overhead system-call auditing infrastructure that
config LOG_BUF_SHIFT
int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
range 12 21
- default 17 if S390 || LOCKDEP
- default 16 if X86_NUMAQ || IA64
- default 15 if SMP
- default 14
+ default 17
help
Select kernel log buffer size as a power of 2.
- Defaults and Examples:
- 17 => 128 KB for S/390
- 16 => 64 KB for x86 NUMAQ or IA-64
- 15 => 32 KB for SMP
- 14 => 16 KB for uniprocessor
+ Examples:
+ 17 => 128 KB
+ 16 => 64 KB
+ 15 => 32 KB
+ 14 => 16 KB
13 => 8 KB
12 => 4 KB
Say N if unsure.
-config FAIR_GROUP_SCHED
- bool "Fair group CPU scheduler"
+config GROUP_SCHED
+ bool "Group CPU scheduler"
default y
help
This feature lets CPU scheduler recognize task groups and control CPU
bandwidth allocation to such task groups.
+config FAIR_GROUP_SCHED
+ bool "Group scheduling for SCHED_OTHER"
+ depends on GROUP_SCHED
+ default y
+
+config RT_GROUP_SCHED
+ bool "Group scheduling for SCHED_RR/FIFO"
+ depends on EXPERIMENTAL
+ depends on GROUP_SCHED
+ default n
+ help
+ This feature lets you explicitly allocate real CPU bandwidth
+ to users or control groups (depending on the "Basis for grouping tasks"
+ setting below. If enabled, it will also make it impossible to
+ schedule realtime tasks for non-root users until you allocate
+ realtime bandwidth for them.
+ See Documentation/sched-rt-group.txt for more information.
+
choice
- depends on FAIR_GROUP_SCHED
+ depends on GROUP_SCHED
prompt "Basis for grouping tasks"
- default FAIR_USER_SCHED
+ default USER_SCHED
-config FAIR_USER_SCHED
+config USER_SCHED
bool "user id"
help
This option will choose userid as the basis for grouping
tasks, thus providing equal CPU bandwidth to each user.
-config FAIR_CGROUP_SCHED
+config CGROUP_SCHED
bool "Control groups"
depends on CGROUPS
help
Provides a simple Resource Controller for monitoring the
total CPU consumed by the tasks in a cgroup
+config RESOURCE_COUNTERS
+ bool "Resource counters"
+ help
+ This option enables controller independent resource accounting
+ infrastructure that works with cgroups
+ depends on CGROUPS
+
+config CGROUP_MEM_RES_CTLR
+ bool "Memory Resource Controller for Control Groups"
+ depends on CGROUPS && RESOURCE_COUNTERS
+ help
+ Provides a memory resource controller that manages both page cache and
+ RSS memory.
+
+ Note that setting this option increases fixed memory overhead
+ associated with each page of memory in the system by 4/8 bytes
+ and also increases cache misses because struct page on many 64bit
+ systems will not fit into a single cache line anymore.
+
+ Only enable when you're ok with these trade offs and really
+ sure you need the memory resource controller.
+
config SYSFS_DEPRECATED
+ bool
+
+config SYSFS_DEPRECATED_V2
bool "Create deprecated sysfs files"
+ depends on SYSFS
default y
+ select SYSFS_DEPRECATED
help
This option creates deprecated symlinks such as the
"device"-link, the <subsystem>:<name>-link, and the
If enabled, this option will also move any device structures
that belong to a class, back into the /sys/class hierarchy, in
- order to support older versions of udev.
+ order to support older versions of udev and some userspace
+ programs.
- If you are using a distro that was released in 2006 or later,
- it should be safe to say N here.
+ If you are using a distro with the most recent userspace
+ packages, it should be safe to say N here.
config PROC_PID_CPUSET
bool "Include legacy /proc/<pid>/cpuset file"
If unsure, say N.
+config NAMESPACES
+ bool "Namespaces support" if EMBEDDED
+ default !EMBEDDED
+ help
+ Provides the way to make tasks work with different objects using
+ the same id. For example same IPC id may refer to different objects
+ or same user id or pid may refer to different tasks when used in
+ different namespaces.
+
+config UTS_NS
+ bool "UTS namespace"
+ depends on NAMESPACES
+ help
+ In this namespace tasks see different info provided with the
+ uname() system call
+
+config IPC_NS
+ bool "IPC namespace"
+ depends on NAMESPACES && SYSVIPC
+ help
+ In this namespace tasks work with IPC ids which correspond to
+ different IPC objects in different namespaces
+
+config USER_NS
+ bool "User namespace (EXPERIMENTAL)"
+ depends on NAMESPACES && EXPERIMENTAL
+ help
+ This allows containers, i.e. vservers, to use user namespaces
+ to provide different user info for different servers.
+ If unsure, say N.
+
+config PID_NS
+ bool "PID Namespaces (EXPERIMENTAL)"
+ default n
+ depends on NAMESPACES && EXPERIMENTAL
+ help
+ Suport process id namespaces. This allows having multiple
+ process with the same pid as long as they are in different
+ pid namespaces. This is a building block of containers.
+
+ Unless you want to work with an experimental feature
+ say N here.
+
config BLK_DEV_INITRD
bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
depends on BROKEN || !FRV
endif
config CC_OPTIMIZE_FOR_SIZE
- bool "Optimize for size (Look out for broken compilers!)"
+ bool "Optimize for size"
default y
- depends on ARM || H8300 || SUPERH || EXPERIMENTAL
help
Enabling this option will pass "-Os" instead of "-O2" to gcc
resulting in a smaller kernel.
- WARNING: some versions of gcc may generate incorrect code with this
- option. If problems are observed, a gcc upgrade may be needed.
-
If unsure, say N.
config SYSCTL
config UID16
bool "Enable 16-bit UID system calls" if EMBEDDED
- depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && SPARC32_COMPAT) || UML || (X86_64 && IA32_EMULATION)
+ depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION)
default y
help
This enables the legacy 16-bit UID syscall wrappers.
help
Enable support for generating core dumps. Disabling saves about 4k.
+config COMPAT_BRK
+ bool "Disable heap randomization"
+ default y
+ help
+ Randomizing heap placement makes heap exploits harder, but it
+ also breaks ancient binaries (including anything libc5 based).
+ This option changes the bootup default to heap randomization
+ disabled, and can be overriden runtime by setting
+ /proc/sys/kernel/randomize_va_space to 2.
+
+ On non-ancient distros (post-2000 ones) N is usually a safe choice.
+
config BASE_FULL
default y
bool "Enable full-sized data structures for core" if EMBEDDED
config TIMERFD
bool "Enable timerfd() system call" if EMBEDDED
select ANON_INODES
- depends on BROKEN
default y
help
Enable the timerfd() system call that allows to receive timer
depends on EMBEDDED
bool "SLOB (Simple Allocator)"
help
- SLOB replaces the SLAB allocator with a drastically simpler
- allocator. SLOB is more space efficient than SLAB but does not
- scale well (single lock for all operations) and is also highly
- susceptible to fragmentation. SLUB can accomplish a higher object
- density. It is usually better to use SLUB instead of SLOB.
+ SLOB replaces the stock allocator with a drastically simpler
+ allocator. SLOB is generally more space efficient but
+ does not perform as well on large systems.
endchoice
+config PROFILING
+ bool "Profiling support (EXPERIMENTAL)"
+ help
+ Say Y here to enable the extended profiling support mechanisms used
+ by profilers such as OProfile.
+
+config MARKERS
+ bool "Activate markers"
+ help
+ Place an empty function call at each marker site. Can be
+ dynamically changed for a probe function.
+
+source "arch/Kconfig"
+
+config PROC_PAGE_MONITOR
+ default y
+ depends on PROC_FS && MMU
+ bool "Enable /proc page monitoring" if EMBEDDED
+ help
+ Various /proc files exist to monitor process memory utilization:
+ /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
+ /proc/kpagecount, and /proc/kpageflags. Disabling these
+ interfaces will reduce the size of the kernel by approximately 4kb.
+
endmenu # General setup
config SLABINFO
bool
depends on PROC_FS
- depends on SLAB || SLUB
+ depends on SLAB || SLUB_DEBUG
default y
config RT_MUTEXES
config PREEMPT_NOTIFIERS
bool
+
+config CLASSIC_RCU
+ def_bool !PREEMPT_RCU
+ help
+ This option selects the classic RCU implementation that is
+ designed for best read-side performance on non-realtime
+ systems. Classic RCU is the default. Note that the
+ PREEMPT_RCU symbol is used to select/deselect this option.
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff