+config DEFCONFIG_LIST
+ string
+ depends on !UML
+ option defconfig_list
+ default "/lib/modules/$UNAME_RELEASE/.config"
+ default "/etc/kernel-config"
+ default "/boot/config-$UNAME_RELEASE"
+ default "arch/$ARCH/defconfig"
+
menu "Code maturity level options"
config EXPERIMENTAL
you say Y here, you will be offered the choice of using features or
drivers that are currently considered to be in the alpha-test phase.
-config CLEAN_COMPILE
- bool "Select only drivers expected to compile cleanly" if EXPERIMENTAL
- default y
- help
- Select this option if you don't even want to see the option
- to configure known-broken drivers.
-
- If unsure, say Y
-
config BROKEN
bool
- depends on !CLEAN_COMPILE
- default y
config BROKEN_ON_SMP
bool
config INIT_ENV_ARG_LIMIT
int
- default 32 if !USERMODE
- default 128 if USERMODE
+ default 32 if !UML
+ default 128 if UML
help
- This is the value of the two limits on the number of argument and of
- env.var passed to init from the kernel command line.
+ Maximum of each of the number of arguments and environment
+ variables passed to init from the kernel command line.
endmenu
object and source tree, in that order. Your total string can
be a maximum of 64 characters.
+config LOCALVERSION_AUTO
+ bool "Automatically append version information to the version string"
+ default y
+ help
+ This will try to automatically determine if the current tree is a
+ release tree by looking for git tags that
+ belong to the current top of tree revision.
+
+ A string of the format -gxxxxxxxx will be added to the localversion
+ if a git based tree is found. The string generated by this will be
+ appended after any matching localversion* files, and after the value
+ set in CONFIG_LOCALVERSION
+
+ Note: This requires Perl, and a git repository, but not necessarily
+ the git or cogito tools to be installed.
+
config SWAP
bool "Support for paging of anonymous memory (swap)"
- depends on MMU
+ depends on MMU && BLOCK
default y
help
This option allows you to choose whether you want to have support
- for socalled swap devices or swap files in your kernel that are
+ for so called swap devices or swap files in your kernel that are
used to provide more virtual memory than the actual RAM present
in your computer. If unsure say Y.
config SYSVIPC
bool "System V IPC"
- depends on MMU
---help---
Inter Process Communication is a suite of library functions and
system calls which let processes (running programs) synchronize and
section 6.4 of the Linux Programmer's Guide, available from
<http://www.tldp.org/guides.html>.
+config IPC_NS
+ bool "IPC Namespaces"
+ depends on SYSVIPC
+ default n
+ help
+ Support ipc namespaces. This allows containers, i.e. virtual
+ environments, to use ipc namespaces to provide different ipc
+ objects for different servers. If unsure, say N.
+
config POSIX_MQUEUE
bool "POSIX Message Queues"
depends on NET && EXPERIMENTAL
for processing it. A preliminary version of these tools is available
at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
-config SYSCTL
- bool "Sysctl support"
- ---help---
- The sysctl interface provides a means of dynamically changing
- certain kernel parameters and variables on the fly without requiring
- a recompile of the kernel or reboot of the system. The primary
- interface consists of a system call, but if you say Y to "/proc
- file system support", a tree of modifiable sysctl entries will be
- generated beneath the /proc/sys directory. They are explained in the
- files in <file:Documentation/sysctl/>. Note that enabling this
- option will enlarge the kernel by at least 8 KB.
-
- As it is generally a good thing, you should say Y here unless
- building a kernel for install/rescue disks or your system is very
- limited in memory.
+config TASKSTATS
+ bool "Export task/process statistics through netlink (EXPERIMENTAL)"
+ depends on NET
+ default n
+ help
+ Export selected statistics for tasks/processes through the
+ generic netlink interface. Unlike BSD process accounting, the
+ statistics are available during the lifetime of tasks/processes as
+ responses to commands. Like BSD accounting, they are sent to user
+ space on task exit.
+
+ Say N if unsure.
+
+config TASK_DELAY_ACCT
+ bool "Enable per-task delay accounting (EXPERIMENTAL)"
+ depends on TASKSTATS
+ help
+ Collect information on time spent by a task waiting for system
+ resources like cpu, synchronous block I/O completion and swapping
+ in pages. Such statistics can help in setting a task's priorities
+ relative to other tasks for cpu, io, rss limits etc.
+
+ Say N if unsure.
+
+config TASK_XACCT
+ bool "Enable extended accounting over taskstats (EXPERIMENTAL)"
+ depends on TASKSTATS
+ help
+ Collect extended task accounting data and send the data
+ to userland for processing over the taskstats interface.
+
+ Say N if unsure.
+
+config TASK_IO_ACCOUNTING
+ bool "Enable per-task storage I/O accounting (EXPERIMENTAL)"
+ depends on TASK_XACCT
+ help
+ Collect information on the number of bytes of storage I/O which this
+ task has caused.
+
+ Say N if unsure.
+
+config UTS_NS
+ bool "UTS Namespaces"
+ default n
+ help
+ Support uts namespaces. This allows containers, i.e.
+ vservers, to use uts namespaces to provide different
+ uts info for different servers. If unsure, say N.
config AUDIT
bool "Auditing support"
- default y if SECURITY_SELINUX
+ depends on NET
help
Enable auditing infrastructure that can be used with another
kernel subsystem, such as SELinux (which requires this for
config AUDITSYSCALL
bool "Enable system-call auditing support"
- depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64)
+ depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64)
default y if SECURITY_SELINUX
help
Enable low-overhead system-call auditing infrastructure that
can be used independently or with another kernel subsystem,
- such as SELinux.
-
-config HOTPLUG
- bool "Support for hot-pluggable devices" if !ARCH_S390
- default ARCH_S390
- help
- This option is provided for the case where no in-kernel-tree
- modules require HOTPLUG functionality, but a module built
- outside the kernel tree does. Such modules require Y here.
-
-config KOBJECT_UEVENT
- bool "Kernel Userspace Events"
- depends on NET
- default y
- help
- This option enables the kernel userspace event layer, which is a
- simple mechanism for kernel-to-user communication over a netlink
- socket.
- The goal of the kernel userspace events layer is to provide a simple
- and efficient events system, that notifies userspace about kobject
- state changes. This will enable applications to just listen for
- events instead of polling system devices and files.
- Hotplug events (kobject addition and removal) are also available on
- the netlink socket in addition to the execution of /sbin/hotplug if
- CONFIG_HOTPLUG is enabled.
-
- Say Y, unless you are building a system requiring minimal memory
- consumption.
+ such as SELinux. To use audit's filesystem watch feature, please
+ ensure that INOTIFY is configured.
config IKCONFIG
- bool "Kernel .config support"
+ tristate "Kernel .config support"
---help---
This option enables the complete Linux kernel ".config" file
contents to be saved in the kernel. It provides documentation
bool "Cpuset support"
depends on SMP
help
- This options will let you create and manage CPUSET's which
+ 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.
Say N if unsure.
+config SYSFS_DEPRECATED
+ bool "Create deprecated sysfs files"
+ default y
+ help
+ This option creates deprecated symlinks such as the
+ "device"-link, the <subsystem>:<name>-link, and the
+ "bus"-link. It may also add deprecated key in the
+ uevent environment.
+ None of these features or values should be used today, as
+ they export driver core implementation details to userspace
+ or export properties which can't be kept stable across kernel
+ releases.
+
+ If enabled, this option will also move any device structures
+ that belong to a class, back into the /sys/class heirachy, in
+ order to support older versions of udev.
+
+ If you are using a distro that was released in 2006 or later,
+ it should be safe to say N here.
+
+config RELAY
+ bool "Kernel->user space relay support (formerly relayfs)"
+ help
+ This option enables support for relay interface support in
+ certain file systems (such as debugfs).
+ It is designed to provide an efficient mechanism for tools and
+ facilities to relay large amounts of data from kernel space to
+ user space.
+
+ If unsure, say N.
+
+if BLK_DEV_INITRD
+
+source "usr/Kconfig"
+
+endif
+
+config CC_OPTIMIZE_FOR_SIZE
+ bool "Optimize for size (Look out for broken compilers!)"
+ default y
+ depends on ARM || H8300 || 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
+ bool
+
menuconfig EMBEDDED
bool "Configure standard kernel features (for small systems)"
help
environments which can tolerate a "non-standard" kernel.
Only use this if you really know what you are doing.
+config UID16
+ bool "Enable 16-bit UID system calls" if EMBEDDED
+ depends on ARM || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && SPARC32_COMPAT) || UML || (X86_64 && IA32_EMULATION)
+ default y
+ help
+ This enables the legacy 16-bit UID syscall wrappers.
+
+config SYSCTL_SYSCALL
+ bool "Sysctl syscall support" if EMBEDDED
+ default y
+ select SYSCTL
+ ---help---
+ sys_sysctl uses binary paths that have been found challenging
+ to properly maintain and use. The interface in /proc/sys
+ using paths with ascii names is now the primary path to this
+ information.
+
+ Almost nothing using the binary sysctl interface so if you are
+ trying to save some space it is probably safe to disable this,
+ making your kernel marginally smaller.
+
+ If unsure say Y here.
+
config KALLSYMS
- bool "Load all symbols for debugging/kksymoops" if EMBEDDED
+ bool "Load all symbols for debugging/ksymoops" if EMBEDDED
default y
help
Say Y here to let the kernel print out symbolic crash information and
help
Normally kallsyms only contains the symbols of functions, for nicer
OOPS messages. Some debuggers can use kallsyms for other
- symbols too: say Y here to include all symbols, and you
- don't care about adding 300k to the size of your kernel.
+ symbols too: say Y here to include all symbols, if you need them
+ and you don't care about adding 300k to the size of your kernel.
Say N.
reported. KALLSYMS_EXTRA_PASS is only a temporary workaround while
you wait for kallsyms to be fixed.
+
+config HOTPLUG
+ bool "Support for hot-pluggable devices" if EMBEDDED
+ default y
+ help
+ This option is provided for the case where no hotplug or uevent
+ capabilities is wanted by the kernel. You should only consider
+ disabling this option for embedded systems that do not use modules, a
+ dynamic /dev tree, or dynamic device discovery. Just say Y.
+
+config PRINTK
+ default y
+ bool "Enable support for printk" if EMBEDDED
+ help
+ This option enables normal printk support. Removing it
+ eliminates most of the message strings from the kernel image
+ and makes the kernel more or less silent. As this makes it
+ very difficult to diagnose system problems, saying N here is
+ strongly discouraged.
+
config BUG
bool "BUG() support" if EMBEDDED
default y
option for embedded systems with no facilities for reporting errors.
Just say Y.
+config ELF_CORE
+ default y
+ bool "Enable ELF core dumps" if EMBEDDED
+ help
+ Enable support for generating core dumps. Disabling saves about 4k.
+
config BASE_FULL
default y
bool "Enable full-sized data structures for core" if EMBEDDED
config FUTEX
bool "Enable futex support" if EMBEDDED
default y
+ select RT_MUTEXES
help
Disabling this option will cause the kernel to be built without
support for "fast userspace mutexes". The resulting kernel may not
Disabling this option will cause the kernel to be built without
support for epoll family of system calls.
-config CC_OPTIMIZE_FOR_SIZE
- bool "Optimize for size" if EMBEDDED
- default y if ARM || H8300
- 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 SHMEM
bool "Use full shmem filesystem" if EMBEDDED
default y
option replaces shmem and tmpfs with the much simpler ramfs code,
which may be appropriate on small systems without swap.
-config CC_ALIGN_FUNCTIONS
- int "Function alignment" if EMBEDDED
- default 0
- help
- Align the start of functions to the next power-of-two greater than n,
- skipping up to n bytes. For instance, 32 aligns functions
- to the next 32-byte boundary, but 24 would align to the next
- 32-byte boundary only if this can be done by skipping 23 bytes or less.
- Zero means use compiler's default.
-
-config CC_ALIGN_LABELS
- int "Label alignment" if EMBEDDED
- default 0
- help
- Align all branch targets to a power-of-two boundary, skipping
- up to n bytes like ALIGN_FUNCTIONS. This option can easily
- make code slower, because it must insert dummy operations for
- when the branch target is reached in the usual flow of the code.
- Zero means use compiler's default.
-
-config CC_ALIGN_LOOPS
- int "Loop alignment" if EMBEDDED
- default 0
+config SLAB
+ default y
+ bool "Use full SLAB allocator" if (EMBEDDED && !SMP && !SPARSEMEM)
help
- Align loops to a power-of-two boundary, skipping up to n bytes.
- Zero means use compiler's default.
+ Disabling this replaces the advanced SLAB allocator and
+ kmalloc support with the drastically simpler SLOB allocator.
+ SLOB is more space efficient but does not scale well and is
+ more susceptible to fragmentation.
-config CC_ALIGN_JUMPS
- int "Jump alignment" if EMBEDDED
- default 0
+config VM_EVENT_COUNTERS
+ default y
+ bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
help
- Align branch targets to a power-of-two boundary, for branch
- targets where the targets can only be reached by jumping,
- skipping up to n bytes like ALIGN_FUNCTIONS. In this case,
- no dummy operations need be executed.
- Zero means use compiler's default.
+ VM event counters are needed for event counts to be shown.
+ This option allows the disabling of the VM event counters
+ on EMBEDDED systems. /proc/vmstat will only show page counts
+ if VM event counters are disabled.
endmenu # General setup
+config RT_MUTEXES
+ boolean
+ select PLIST
+
config TINY_SHMEM
default !SHMEM
bool
default 0 if BASE_FULL
default 1 if !BASE_FULL
+config SLOB
+ default !SLAB
+ bool
+
menu "Loadable module support"
config MODULES
rmmod). This is mainly for kernel developers and desperate users.
If unsure, say N.
-config OBSOLETE_MODPARM
- bool
- default y
- depends on MODULES
- help
- You need this option to use module parameters on modules which
- have not been converted to the new module parameter system yet.
- If unsure, say Y.
-
config MODVERSIONS
- bool "Module versioning support (EXPERIMENTAL)"
- depends on MODULES && EXPERIMENTAL && !UML
+ bool "Module versioning support"
+ depends on MODULES
help
Usually, you have to use modules compiled with your kernel.
Saying Y here makes it sometimes possible to use modules
help
Need stop_machine() primitive.
endmenu
+
+menu "Block layer"
+source "block/Kconfig"
+endmenu
Code Review / linux-2.6.git / blobdiff