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Message-ID: <20080222-114832-init-kconfig-7@tull.net>
Date: Fri, 22 Feb 2008 11:56:55 +1100
From: Nick Andrew <nick@...k-andrew.net>
To: trivial@...nel.org
Cc: linux-kernel@...r.kernel.org, Pavel Emelyanov <xemul@...nvz.org>,
Serge Hallyn <serue@...ibm.com>,
Randy Dunlap <randy.dunlap@...cle.com>,
Paul Menage <menage@...gle.com>, Paul Jackson <pj@....com>,
Valdis Kletnieks <Valdis.Kletnieks@...edu>
Subject: [PATCH 2.6.25-rc2 7/9] Kconfig: Improve init/Kconfig help descriptions - EMBEDDED etc
Rewrite the help descriptions for clarity, accuracy and consistency.
Kernel config options affected:
- EMBEDDED
- SYSCTL_SYSCALL
- KALLSYMS
- KALLSYMS_ALL
- KALLSYMS_EXTRA_PASS
- HOTPLUG
- PRINTK
- BUG
- ELF_CORE
- BASE_FULL
- FUTEX
- EPOLL
- SIGNALFD
- TIMERFD
- EVENTFD
Signed-off-by: Nick Andrew <nick@...k-andrew.net>
---
Try #3.
--- a/init/Kconfig 2008-02-20 09:34:48.000000000 +1100
+++ b/init/Kconfig 2008-02-20 09:36:28.000000000 +1100
@@ -495,10 +495,14 @@ menuconfig EMBEDDED
bool "Configure standard kernel features (for small systems)"
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.
+ to be disabled or tweaked. This is for embedded systems and
+ specialized environments which can tolerate a "non-standard"
+ kernel.
+
Only use this if you really know what you are doing.
+ If unsure, say N.
+
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)
@@ -516,51 +520,62 @@ config SYSCTL_SYSCALL
using paths with ascii names is now the primary path to this
information.
- Almost nothing using the binary sysctl interface so if you are
+ Almost nothing uses 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.
+ If unsure, say Y.
config KALLSYMS
- 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
- symbolic stack backtraces. This increases the size of the kernel
- somewhat, as all symbols have to be loaded into the kernel image.
+ bool "Load all symbols for debugging/ksymoops" if EMBEDDED
+ default y
+ help
+ This information causes the kernel to print out symbolic crash
+ information and symbolic stack backtraces.
+
+ It increases the size of the kernel somewhat, as all symbols
+ have to be loaded into the kernel image.
+
+ If unsure, say Y.
config KALLSYMS_ALL
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. Some debuggers can use kallsyms for other
+ symbols too: say Y here to include all symbols, if you need them.
+
+ Your kernel size will increase by around 300k.
- Say N.
+ If unsure, 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.
+ 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.
+ If unsure, say N.
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.
+ capabilities are 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.
+
+ If unsure, say Y.
config PRINTK
default y
@@ -572,21 +587,30 @@ config PRINTK
very difficult to diagnose system problems, saying N here is
strongly discouraged.
+ If unsure, say Y.
+
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.
+ numerous fatal conditions.
+
+ You should only consider disabling this option for embedded
+ systems with no facilities for reporting errors.
+
+ If unsure, 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.
+ Enable support for generating core dumps when a process fails.
+
+ Your kernel size will increase by around 4k.
+
+ If unsure, say Y.
config COMPAT_BRK
bool "Disable heap randomization"
@@ -608,6 +632,8 @@ config BASE_FULL
kernel data structures. This saves memory on small machines,
but may reduce performance.
+ If unsure, say Y.
+
config FUTEX
bool "Enable futex support" if EMBEDDED
default y
@@ -617,6 +643,8 @@ config FUTEX
support for "fast userspace mutexes". The resulting kernel may not
run glibc-based applications correctly.
+ If unsure, say Y.
+
config ANON_INODES
bool
@@ -628,13 +656,15 @@ config EPOLL
Disabling this option will cause the kernel to be built without
support for epoll family of system calls.
+ If unsure, say Y.
+
config SIGNALFD
bool "Enable signalfd() system call" if EMBEDDED
select ANON_INODES
default y
help
- Enable the signalfd() system call that allows to receive signals
- on a file descriptor.
+ Enable the signalfd() system call that allows a process to
+ receive signals on a file descriptor.
If unsure, say Y.
@@ -643,8 +673,8 @@ config TIMERFD
select ANON_INODES
default y
help
- Enable the timerfd() system call that allows to receive timer
- events on a file descriptor.
+ Enable the timerfd() system call that allows a process to
+ receive timer events on a file descriptor.
If unsure, say Y.
@@ -653,8 +683,9 @@ config EVENTFD
select ANON_INODES
default y
help
- Enable the eventfd() system call that allows to receive both
- kernel notification (ie. KAIO) or userspace notifications.
+ Enable the eventfd() system call that allows a process to
+ receive both kernel notification (ie. KAIO) or userspace
+ notifications.
If unsure, say Y.
--
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