diff options
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 73 |
1 files changed, 41 insertions, 32 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f771806bbfd4..94fe812f4257 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1,14 +1,23 @@ +config PRINTK_TIME + bool "Show timing information on printks" + help + Selecting this option causes timing information to be + included in printk output. This allows you to measure + the interval between kernel operations, including bootup + operations. This is useful for identifying long delays + in kernel startup. + + config DEBUG_KERNEL bool "Kernel debugging" - depends on (ALPHA || ARM || CRIS || H8300 || X86 || IA64 || M32R || M68K || M68KNOMMU || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SUPERH || SUPERH64 || SPARC32 || SPARC64 || USERMODE || V850 || X86_64) help Say Y here if you are developing drivers or trying to debug and identify kernel problems. config MAGIC_SYSRQ bool "Magic SysRq key" - depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || M32R || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SUPERH || SUPERH64 || SPARC32 || SPARC64 || X86_64 || USERMODE) + depends on DEBUG_KERNEL help If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you @@ -20,21 +29,22 @@ config MAGIC_SYSRQ keys are documented in <file:Documentation/sysrq.txt>. Don't say Y unless you really know what this hack does. -config MAGIC_SYSRQ - bool "Magic SysRq key" - depends on DEBUG_KERNEL && (H8300 || M68KNOMMU || V850) - help - Enables console device to interpret special characters as - commands to dump state information. - -config PRINTK_TIME - bool "Show timing information on printks" - help - Selecting this option causes timing information to be - included in printk output. This allows you to measure - the interval between kernel operations, including bootup - operations. This is useful for identifying long delays - in kernel startup. +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 SCHEDSTATS bool "Collect scheduler statistics" @@ -50,7 +60,7 @@ config SCHEDSTATS config DEBUG_SLAB bool "Debug memory allocations" - depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || M32R || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || SPARC32 || SPARC64 || USERMODE || X86_64) + depends on DEBUG_KERNEL help Say Y here to have the kernel do limited verification on memory allocation as well as poisoning memory on free to catch use of freed @@ -58,7 +68,7 @@ config DEBUG_SLAB config DEBUG_PREEMPT bool "Debug preemptible kernel" - depends on PREEMPT + depends on DEBUG_KERNEL && PREEMPT default y help If you say Y here then the kernel will use a debug variant of the @@ -68,7 +78,7 @@ config DEBUG_PREEMPT config DEBUG_SPINLOCK bool "Spinlock debugging" - depends on DEBUG_KERNEL && (ALPHA || ARM || X86 || IA64 || M32R || MIPS || PARISC || PPC32 || (SUPERH && !SUPERH64) || SPARC32 || SPARC64 || USERMODE || X86_64) + depends on DEBUG_KERNEL help Say Y here and build SMP to catch missing spinlock initialization and certain other kinds of spinlock errors commonly made. This is @@ -77,7 +87,7 @@ config DEBUG_SPINLOCK config DEBUG_SPINLOCK_SLEEP bool "Sleep-inside-spinlock checking" - depends on DEBUG_KERNEL && (X86 || IA64 || M32R || MIPS || PPC32 || PPC64 || ARCH_S390 || SPARC32 || SPARC64 || USERMODE) + depends on DEBUG_KERNEL help If you say Y here, various routines which may sleep will become very noisy if they are called with a spinlock held. @@ -91,7 +101,7 @@ config DEBUG_KOBJECT config DEBUG_HIGHMEM bool "Highmem debugging" - depends on DEBUG_KERNEL && HIGHMEM && (X86 || PPC32 || MIPS || SPARC32) + depends on DEBUG_KERNEL && HIGHMEM help This options enables addition error checking for high memory systems. Disable for production systems. @@ -107,7 +117,7 @@ config DEBUG_BUGVERBOSE config DEBUG_INFO bool "Compile the kernel with debug info" - depends on DEBUG_KERNEL && (ALPHA || CRIS || X86 || IA64 || M32R || M68K || MIPS || PARISC || PPC32 || PPC64 || ARCH_S390 || (SUPERH && !SUPERH64) || SPARC64 || V850 || X86_64) + depends on DEBUG_KERNEL help If you say Y here the resulting kernel image will include debugging info resulting in a larger kernel image. @@ -118,13 +128,13 @@ config DEBUG_INFO bool "Enable kernel debugging symbols" depends on DEBUG_KERNEL && USERMODE help - When this is enabled, the User-Mode Linux binary will include - debugging symbols. This enlarges the binary by a few megabytes, - but aids in tracking down kernel problems in UML. It is required - if you intend to do any kernel development. + When this is enabled, the User-Mode Linux binary will include + debugging symbols. This enlarges the binary by a few megabytes, + but aids in tracking down kernel problems in UML. It is required + if you intend to do any kernel development. - If you're truly short on disk space or don't expect to report any - bugs back to the UML developers, say N, otherwise say Y. + If you're truly short on disk space or don't expect to report any + bugs back to the UML developers, say N, otherwise say Y. config DEBUG_IOREMAP bool "Enable ioremap() debugging" @@ -149,13 +159,12 @@ config DEBUG_FS If unsure, say N. -if !X86_64 config FRAME_POINTER bool "Compile the kernel with frame pointers" - depends on X86 || CRIS || M68KNOMMU + depends on DEBUG_KERNEL && ((X86 && !X86_64) || CRIS || M68K || M68KNOMMU) help If you say Y here the resulting kernel image will be slightly larger and slower, but it will give very useful debugging information. If you don't debug the kernel, you can say N, but we may not be able to solve problems without frame pointers. -endif + |