X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=init%2FKconfig;h=7af4079496b3df1501bca347bb096086bc895221;hb=2ea119425cd2aa4d5e8024122c260817a358038c;hp=974d75897a9c85c071e90a65fa85da30a7469297;hpb=07a52d56ceb8e544a77e338fe531e050bf1a9ca3;p=linux-2.6.git diff --git a/init/Kconfig b/init/Kconfig index 974d75897..7af407949 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -31,19 +31,8 @@ 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 @@ -55,6 +44,14 @@ config LOCK_KERNEL depends on SMP || PREEMPT default y +config INIT_ENV_ARG_LIMIT + int + default 32 if !USERMODE + default 128 if USERMODE + help + Maximum of each of the number of arguments and environment + variables passed to init from the kernel command line. + endmenu menu "General setup" @@ -69,19 +66,34 @@ config LOCALVERSION 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 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 @@ -90,8 +102,6 @@ config SYSVIPC you want to run the DOS emulator dosemu under Linux (read the DOSEMU-HOWTO, available from ), you'll need to say Y here. - DOSEMU-HOWTO, available from ), - you'll need to say Y here. You can find documentation about IPC with "info ipc" and also in section 6.4 of the Linux Programmer's Guide, available from @@ -140,163 +150,6 @@ config BSD_PROCESS_ACCT_V3 for processing it. A preliminary version of these tools is available at . -menu "Class Based Kernel Resource Management" - -config CKRM - bool "Class Based Kernel Resource Management Core" - depends on EXPERIMENTAL - help - Class-based Kernel Resource Management is a framework for controlling - and monitoring resource allocation of user-defined groups of tasks or - incoming socket connections. For more information, please visit - http://ckrm.sf.net. - - If you say Y here, enable the Resource Class File System and atleast - one of the resource controllers below. Say N if you are unsure. - -config RCFS_FS - tristate "Resource Class File System (User API)" - depends on CKRM - help - RCFS is the filesystem API for CKRM. This separate configuration - option is provided only for debugging and will eventually disappear - since rcfs will be automounted whenever CKRM is configured. - - Say N if unsure, Y if you've enabled CKRM, M to debug rcfs - initialization. - -config CKRM_TYPE_TASKCLASS - bool "Class Manager for Task Groups" - depends on CKRM - help - TASKCLASS provides the extensions for CKRM to track task classes - This is the base to enable task class based resource control for - cpu, memory and disk I/O. - - Say N if unsure - -config CKRM_RES_NULL - tristate "Null Tasks Resource Manager" - depends on CKRM_TYPE_TASKCLASS - default m - help - Provides a Null Resource Controller for CKRM that is purely for - demonstration purposes. - - Say N if unsure, Y to use the feature. - -config CKRM_RES_NUMTASKS - tristate "Number of Tasks Resource Manager" - depends on CKRM_TYPE_TASKCLASS - default m - help - Provides a Resource Controller for CKRM that allows limiting no of - tasks a task class can have. - - Say N if unsure, Y to use the feature. - -config CKRM_CPU_SCHEDULE - bool "CKRM CPU scheduler" - depends on CKRM_TYPE_TASKCLASS - default y - help - Use CKRM CPU scheduler instead of Linux Scheduler - - Say N if unsure, Y to use the feature. - -config CKRM_RES_BLKIO - tristate " Disk I/O Resource Controller" - depends on CKRM_TYPE_TASKCLASS && IOSCHED_CFQ - default m - help - Provides a resource controller for best-effort block I/O - bandwidth control. The controller attempts this by proportional - servicing of requests in the I/O scheduler. However, seek - optimizations and reordering by device drivers/disk controllers may - alter the actual bandwidth delivered to a class. - - Say N if unsure, Y to use the feature. - -config CKRM_RES_MEM - bool "Class based physical memory controller" - default y - depends on CKRM - help - Provide the basic support for collecting physical memory usage information - among classes. Say Y if you want to know the memory usage of each class. - -config CKRM_MEM_LRUORDER_CHANGE - bool "Change the LRU ordering of scanned pages" - default n - depends on CKRM_RES_MEM - help - While trying to free pages, by default(n), scanned pages are left were they - are found if they belong to relatively under-used class. In this case the - LRU ordering of the memory subsystemis left intact. If this option is chosen, - then the scanned pages are moved to the tail of the list(active or inactive). - Changing this to yes reduces the checking overhead but violates the approximate - LRU order that is maintained by the paging subsystem. - -config CKRM_CPU_SCHEDULE_AT_BOOT - bool "Turn on at boot time" - depends on CKRM_CPU_SCHEDULE - default n - help - Enable CKRM CPU Scheduler at boot time. Otherwise - it can be turned on dynamically at runtime. If not - turned on the default Linux Scheduler behavior - will be obtained. - - Say N if unsure, Y to use this feature - -config CKRM_TYPE_SOCKETCLASS - bool "Class Manager for socket groups" - depends on CKRM - help - SOCKET provides the extensions for CKRM to track per socket - classes. This is the base to enable socket based resource - control for inbound connection control, bandwidth control etc. - - Say N if unsure. - -config CKRM_RES_LISTENAQ - tristate "Multiple Accept Queues Resource Manager" - depends on CKRM_TYPE_SOCKETCLASS && ACCEPT_QUEUES - default m - help - Provides a resource controller for CKRM to prioritize inbound - connection requests. See inbound control description for - "IP: TCP Multiple accept queues support". If you choose that - option choose this option to control the queue weights. - - If unsure, say N. - -config CKRM_RBCE - tristate "Vanilla Rule-based Classification Engine (RBCE)" - depends on CKRM && RCFS_FS - default m - help - Provides an optional module to support creation of rules for automatic - classification of kernel objects. Rules are created/deleted/modified - through an rcfs interface. RBCE is not required for CKRM. - - If unsure, say N. - -config CKRM_CRBCE - tristate "Enhanced Rule-based Classification Engine (RBCE)" - depends on CKRM && RCFS_FS && RELAYFS_FS && DELAY_ACCT - default m - help - Provides an optional module to support creation of rules for automatic - classification of kernel objects, just like RBCE above. In addition, - CRBCE provides per-process delay data (requires DELAY_ACCT configured) - enabled) and makes information on significant kernel events available - to userspace tools through relayfs (requires RELAYFS_FS configured). - - If unsure, say N. - -endmenu - config SYSCTL bool "Sysctl support" ---help--- @@ -315,8 +168,7 @@ config SYSCTL config AUDIT bool "Auditing support" - default y if SECURITY_SELINUX - default n + depends on NET help Enable auditing infrastructure that can be used with another kernel subsystem, such as SELinux (which requires this for @@ -325,69 +177,13 @@ config AUDIT 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 - default n help Enable low-overhead system-call auditing infrastructure that can be used independently or with another kernel subsystem, such as SELinux. -config LOG_BUF_SHIFT - int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL - range 12 21 - default 17 if ARCH_S390 - default 16 if X86_NUMAQ || IA64 - default 15 if SMP - default 14 - 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 - 13 => 8 KB - 12 => 4 KB - -config HOTPLUG - bool "Support for hot-pluggable devices" if !ARCH_S390 - default ARCH_S390 - help - Say Y here if you want to plug devices into your computer while - the system is running, and be able to use them quickly. In many - cases, the devices can likewise be unplugged at any time too. - - One well known example of this is PCMCIA- or PC-cards, credit-card - size devices such as network cards, modems or hard drives which are - plugged into slots found on all modern laptop computers. Another - example, used on modern desktops as well as laptops, is USB. - - Enable HOTPLUG and KMOD, and build a modular kernel. Get agent - software (at ) and install it. - Then your kernel will automatically call out to a user mode "policy - agent" (/sbin/hotplug) to load modules and set up software needed - to use devices as you hotplug them. - -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. - config IKCONFIG bool "Kernel .config support" ---help--- @@ -424,6 +220,60 @@ config OOM_KILL depends on !OOM_PANIC default y +config CPUSETS + bool "Cpuset support" + depends on SMP + 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. + + Say N if unsure. + +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. + +source "usr/Kconfig" + +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 VM86 + depends X86 + default y + bool "Enable VM86 support" if EMBEDDED + help + This option is required by programs like DOSEMU to run 16-bit legacy + code on X86 processors. It also may be needed by software like + XFree86 to initialize some video cards via BIOS. Disabling this + option saves about 6k. + +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. + menuconfig EMBEDDED bool "Configure standard kernel features (for small systems)" help @@ -432,15 +282,6 @@ menuconfig EMBEDDED environments which can tolerate a "non-standard" kernel. Only use this if you really know what you are doing. -config DELAY_ACCT - bool "Enable delay accounting (EXPERIMENTAL)" - help - In addition to counting frequency the total delay in ns is also - recorded. CPU delays are specified as cpu-wait and cpu-run. - I/O delays are recorded for memory and regular I/O. - Information is accessible through /proc//delay. - - config KALLSYMS bool "Load all symbols for debugging/kksymoops" if EMBEDDED default y @@ -455,8 +296,8 @@ config KALLSYMS_ALL 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. @@ -471,6 +312,50 @@ config KALLSYMS_EXTRA_PASS 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 + help + Disabling this option eliminates support for BUG and WARN, reducing + the size of your kernel image and potentially quietly ignoring + numerous fatal conditions. You should only consider disabling this + 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 + help + Disabling this option reduces the size of miscellaneous core + kernel data structures. This saves memory on small machines, + but may reduce performance. + config FUTEX bool "Enable futex support" if EMBEDDED default y @@ -486,22 +371,10 @@ config EPOLL 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" - default y if ARM || H8300 - default n - 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 - bool "Use full shmem filesystem" if EMBEDDED && MMU + depends on MMU help The shmem is an internal filesystem used to manage shared memory. It is backed by swap and manages resource limits. It is also exported @@ -509,42 +382,14 @@ config SHMEM 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 - help - Align loops to a power-of-two boundary, skipping up to n bytes. - Zero means use compiler's default. - -config CC_ALIGN_JUMPS - int "Jump alignment" if EMBEDDED - default 0 +config SLAB + default y + bool "Use full SLAB allocator" 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. + 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. endmenu # General setup @@ -552,6 +397,18 @@ config TINY_SHMEM default !SHMEM bool +config BASE_SMALL + int + default 0 if BASE_FULL + default 1 if !BASE_FULL + +config SLOB + default !SLAB + bool + +config OBSOLETE_INTERMODULE + tristate + menu "Loadable module support" config MODULES @@ -593,18 +450,9 @@ config MODULE_FORCE_UNLOAD 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 + 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 @@ -660,3 +508,7 @@ config STOP_MACHINE help Need stop_machine() primitive. endmenu + +menu "Block layer" +source "block/Kconfig" +endmenu