config CONSTRUCTORS
bool
depends on !UML
- default y
config HAVE_IRQ_WORK
bool
depends on BROKEN || !SMP
default y
-config LOCK_KERNEL
- bool
- depends on (SMP || PREEMPT) && BKL
- default y
-
config INIT_ENV_ARG_LIMIT
int
default 32 if !UML
endchoice
+config DEFAULT_HOSTNAME
+ string "Default hostname"
+ default "(none)"
+ help
+ This option determines the default system hostname before userspace
+ calls sethostname(2). The kernel traditionally uses "(none)" here,
+ but you may wish to use a different default here to make a minimal
+ system more usable with less configuration.
+
config SWAP
bool "Support for paging of anonymous memory (swap)"
depends on MMU && BLOCK
config RCU_BOOST
bool "Enable RCU priority boosting"
- depends on RT_MUTEXES && TINY_PREEMPT_RCU
+ depends on RT_MUTEXES && PREEMPT_RCU
default n
help
This option boosts the priority of preempted RCU readers that
Say N if unsure.
-config CGROUP_NS
- bool "Namespace cgroup subsystem"
- help
- Provides a simple namespace cgroup subsystem to
- provide hierarchical naming of sets of namespaces,
- for instance virtual servers and checkpoint/restart
- jobs.
-
config CGROUP_FREEZER
bool "Freezer cgroup subsystem"
help
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 "noswapaccount" is set, swap will not be accounted.
+ 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 CGROUP_MEM_RES_CTLR_SWAP_ENABLED
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 noswapaccount does the trick).
+ then swapaccount=0 does the trick).
config CGROUP_PERF
bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
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 seti
- CONFIG_CFQ_GROUP_IOSCHED=y and for enabling throttling policy set
- CONFIG_BLK_THROTTLE=y.
+ 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.
See Documentation/cgroups/blkio-controller.txt for more information.
bool
config SYSFS_DEPRECATED
- bool "enable deprecated sysfs features to support old userspace tools"
+ bool "Enable deprecated sysfs features to support old userspace tools"
depends on SYSFS
default n
help
need to say Y here.
config SYSFS_DEPRECATED_V2
- bool "enabled deprecated sysfs features by default"
+ bool "Enable deprecated sysfs features by default"
default n
depends on SYSFS
depends on SYSFS_DEPRECATED
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size"
- default y
help
Enabling this option will pass "-Os" instead of "-O2" to gcc
resulting in a smaller kernel.
menuconfig EXPERT
bool "Configure standard kernel features (expert users)"
+ # Unhide debug options, to make the on-by-default options visible
+ select DEBUG_KERNEL
help
This option allows certain base kernel options and settings
to be disabled or tweaked. This is for specialized
environments which can tolerate a "non-standard" kernel.
Only use this if you really know what you are doing.
-config EMBEDDED
- bool "Embedded system"
- select EXPERT
- help
- This option should be enabled if compiling the kernel for
- an embedded system so certain expert options are available
- for configuration.
-
config UID16
bool "Enable 16-bit UID system calls" if EXPERT
depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION)
bool "Include all symbols in kallsyms"
depends on DEBUG_KERNEL && KALLSYMS
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, if you need them
- and you don't care about adding 300k to the size of your kernel.
+ Normally kallsyms only contains the symbols of functions for nicer
+ OOPS messages and backtraces (i.e., symbols from the text and inittext
+ sections). This is sufficient for most cases. And only in very rare
+ cases (e.g., when a debugger is used) all symbols are required (e.g.,
+ names of variables from the data sections, etc).
- Say N.
-
-config KALLSYMS_EXTRA_PASS
- bool "Do an extra kallsyms pass"
- depends on KALLSYMS
- help
- If kallsyms is not working correctly, the build will fail with
- inconsistent kallsyms data. If that occurs, log a bug report and
- turn on KALLSYMS_EXTRA_PASS which should result in a stable build.
- Always say N here unless you find a bug in kallsyms, which must be
- reported. KALLSYMS_EXTRA_PASS is only a temporary workaround while
- you wait for kallsyms to be fixed.
+ This option makes sure that all symbols are loaded into the kernel
+ image (i.e., symbols from all sections) in cost of increased kernel
+ size (depending on the kernel configuration, it may be 300KiB or
+ something like this).
+ Say N unless you really need all symbols.
config HOTPLUG
bool "Support for hot-pluggable devices" if EXPERT
help
Enable support for generating core dumps. Disabling saves about 4k.
+
config PCSPKR_PLATFORM
bool "Enable PC-Speaker support" if EXPERT
- depends on ALPHA || X86 || MIPS || PPC_PREP || PPC_CHRP || PPC_PSERIES
+ depends on HAVE_PCSPKR_PLATFORM
+ select I8253_LOCK
default y
help
This option allows to disable the internal PC-Speaker
support, saving some memory.
+config HAVE_PCSPKR_PLATFORM
+ bool
+
config BASE_FULL
default y
bool "Enable full-sized data structures for core" if EXPERT
by some high performance threaded applications. Disabling
this option saves about 7k.
+config EMBEDDED
+ bool "Embedded system"
+ select EXPERT
+ help
+ This option should be enabled if compiling the kernel for
+ an embedded system so certain expert options are available
+ for configuration.
+
config HAVE_PERF_EVENTS
bool
help
Code Review / linux-2.6.git / blobdiff