Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[safe/jmp/linux-2.6] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e1d4764..4c9ae60 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -252,6 +252,14 @@ config DEBUG_OBJECTS_TIMERS
          timer routines to track the life time of timer objects and
          validate the timer operations.
 
          timer routines to track the life time of timer objects and
          validate the timer operations.
 

+config DEBUG_OBJECTS_ENABLE_DEFAULT
+       int "debug_objects bootup default value (0-1)"
+        range 0 1
+        default "1"
+        depends on DEBUG_OBJECTS
+        help
+          Debug objects boot parameter default value
+

 config DEBUG_SLAB
        bool "Debug slab memory allocations"
        depends on DEBUG_KERNEL && SLAB
 config DEBUG_SLAB
        bool "Debug slab memory allocations"
        depends on DEBUG_KERNEL && SLAB


@@ -394,7 +402,7 @@ config LOCKDEP
        bool
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
        select STACKTRACE
        bool
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
        select STACKTRACE

-       select FRAME_POINTER if !X86 && !MIPS
+       select FRAME_POINTER if !X86 && !MIPS && !PPC

        select KALLSYMS
        select KALLSYMS_ALL
 
        select KALLSYMS
        select KALLSYMS_ALL
 


@@ -495,6 +503,22 @@ config DEBUG_VM
 
          If unsure, say N.
 
 
          If unsure, say N.
 

+config DEBUG_VIRTUAL
+       bool "Debug VM translations"
+       depends on DEBUG_KERNEL && X86
+       help
+         Enable some costly sanity checks in virtual to page code. This can
+         catch mistakes with virt_to_page() and friends.
+
+         If unsure, say N.
+
+config DEBUG_NOMMU_REGIONS
+       bool "Debug the global anon/private NOMMU mapping region tree"
+       depends on DEBUG_KERNEL && !MMU
+       help
+         This option causes the global tree of anonymous and private mapping
+         regions to be regularly checked for invalid topology.
+

 config DEBUG_WRITECOUNT
        bool "Debug filesystem writers count"
        depends on DEBUG_KERNEL
 config DEBUG_WRITECOUNT
        bool "Debug filesystem writers count"
        depends on DEBUG_KERNEL


@@ -536,17 +560,27 @@ config DEBUG_SG
 
          If unsure, say N.
 
 
          If unsure, say N.
 

+config DEBUG_NOTIFIERS
+       bool "Debug notifier call chains"
+       depends on DEBUG_KERNEL
+       help
+         Enable this to turn on sanity checking for notifier call chains.
+         This is most useful for kernel developers to make sure that
+         modules properly unregister themselves from notifier chains.
+         This is a relatively cheap check but if you care about maximum
+         performance, say N.
+

 config FRAME_POINTER
        bool "Compile the kernel with frame pointers"
        depends on DEBUG_KERNEL && \
 config FRAME_POINTER
        bool "Compile the kernel with frame pointers"
        depends on DEBUG_KERNEL && \

-               (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
-                AVR32 || SUPERH || BLACKFIN || MN10300)
-       default y if DEBUG_INFO && UML
+               (CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
+                AVR32 || SUPERH || BLACKFIN || MN10300) || \
+               ARCH_WANT_FRAME_POINTERS
+       default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS

        help
        help

-         If you say Y here the resulting kernel image will be slightly larger
-         and slower, but it might give very useful debugging information on
-         some architectures or if you use external debuggers.
-         If you don't debug the kernel, you can say N.
+         If you say Y here the resulting kernel image will be slightly
+         larger and slower, but it gives very useful debugging information
+         in case of kernel bugs. (precise oopses/stacktraces/warnings)

 
 config BOOT_PRINTK_DELAY
        bool "Delay each boot printk message by N milliseconds"
 
 config BOOT_PRINTK_DELAY
        bool "Delay each boot printk message by N milliseconds"


@@ -597,6 +631,32 @@ config RCU_TORTURE_TEST_RUNNABLE
          Say N here if you want the RCU torture tests to start only
          after being manually enabled via /proc.
 
          Say N here if you want the RCU torture tests to start only
          after being manually enabled via /proc.
 

+config RCU_CPU_STALL_DETECTOR
+       bool "Check for stalled CPUs delaying RCU grace periods"
+       depends on CLASSIC_RCU
+       default n
+       help
+         This option causes RCU to printk information on which
+         CPUs are delaying the current grace period, but only when
+         the grace period extends for excessive time periods.
+
+         Say Y if you want RCU to perform such checks.
+
+         Say N if you are unsure.
+
+config RCU_CPU_STALL_DETECTOR
+       bool "Check for stalled CPUs delaying RCU grace periods"
+       depends on CLASSIC_RCU || TREE_RCU
+       default n
+       help
+         This option causes RCU to printk information on which
+         CPUs are delaying the current grace period, but only when
+         the grace period extends for excessive time periods.
+
+         Say Y if you want RCU to perform such checks.
+
+         Say N if you are unsure.
+

 config KPROBES_SANITY_TEST
        bool "Kprobes sanity tests"
        depends on DEBUG_KERNEL
 config KPROBES_SANITY_TEST
        bool "Kprobes sanity tests"
        depends on DEBUG_KERNEL


@@ -624,6 +684,33 @@ config BACKTRACE_SELF_TEST
 
          Say N if you are unsure.
 
 
          Say N if you are unsure.
 

+config DEBUG_BLOCK_EXT_DEVT
+        bool "Force extended block device numbers and spread them"
+       depends on DEBUG_KERNEL
+       depends on BLOCK
+       default n
+       help
+         BIG FAT WARNING: ENABLING THIS OPTION MIGHT BREAK BOOTING ON
+         SOME DISTRIBUTIONS.  DO NOT ENABLE THIS UNLESS YOU KNOW WHAT
+         YOU ARE DOING.  Distros, please enable this and fix whatever
+         is broken.
+
+         Conventionally, block device numbers are allocated from
+         predetermined contiguous area.  However, extended block area
+         may introduce non-contiguous block device numbers.  This
+         option forces most block device numbers to be allocated from
+         the extended space and spreads them to discover kernel or
+         userland code paths which assume predetermined contiguous
+         device number allocation.
+
+         Note that turning on this debug option shuffles all the
+         device numbers for all IDE and SCSI devices including libata
+         ones, so root partition specified using device number
+         directly (via rdev or root=MAJ:MIN) won't work anymore.
+         Textual device names (root=/dev/sdXn) will continue to work.
+
+         Say N if you are unsure.
+

 config LKDTM
        tristate "Linux Kernel Dump Test Tool Module"
        depends on DEBUG_KERNEL
 config LKDTM
        tristate "Linux Kernel Dump Test Tool Module"
        depends on DEBUG_KERNEL


@@ -650,6 +737,7 @@ config FAULT_INJECTION
 config FAILSLAB
        bool "Fault-injection capability for kmalloc"
        depends on FAULT_INJECTION
 config FAILSLAB
        bool "Fault-injection capability for kmalloc"
        depends on FAULT_INJECTION

+       depends on SLAB || SLUB

        help
          Provide fault-injection capability for kmalloc.
 
        help
          Provide fault-injection capability for kmalloc.
 


@@ -661,10 +749,21 @@ config FAIL_PAGE_ALLOC
 
 config FAIL_MAKE_REQUEST
        bool "Fault-injection capability for disk IO"
 
 config FAIL_MAKE_REQUEST
        bool "Fault-injection capability for disk IO"

-       depends on FAULT_INJECTION
+       depends on FAULT_INJECTION && BLOCK

        help
          Provide fault-injection capability for disk IO.
 
        help
          Provide fault-injection capability for disk IO.
 

+config FAIL_IO_TIMEOUT
+       bool "Faul-injection capability for faking disk interrupts"
+       depends on FAULT_INJECTION && BLOCK
+       help
+         Provide fault-injection capability on end IO handling. This
+         will make the block layer "forget" an interrupt as configured,
+         thus exercising the error handling.
+
+         Only works with drivers that use the generic timeout handling,
+         for others it wont do anything.
+

 config FAULT_INJECTION_DEBUG_FS
        bool "Debugfs entries for fault-injection capabilities"
        depends on FAULT_INJECTION && SYSFS && DEBUG_FS
 config FAULT_INJECTION_DEBUG_FS
        bool "Debugfs entries for fault-injection capabilities"
        depends on FAULT_INJECTION && SYSFS && DEBUG_FS


@@ -676,13 +775,13 @@ config FAULT_INJECTION_STACKTRACE_FILTER
        depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
        depends on !X86_64
        select STACKTRACE
        depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
        depends on !X86_64
        select STACKTRACE

-       select FRAME_POINTER
+       select FRAME_POINTER if !PPC

        help
          Provide stacktrace filter for fault-injection capabilities
 
 config LATENCYTOP
        bool "Latency measuring infrastructure"
        help
          Provide stacktrace filter for fault-injection capabilities
 
 config LATENCYTOP
        bool "Latency measuring infrastructure"

-       select FRAME_POINTER if !MIPS
+       select FRAME_POINTER if !MIPS && !PPC

        select KALLSYMS
        select KALLSYMS_ALL
        select STACKTRACE
        select KALLSYMS
        select KALLSYMS_ALL
        select STACKTRACE


@@ -693,6 +792,14 @@ config LATENCYTOP
          Enable this option if you want to use the LatencyTOP tool
          to find out which userspace is blocking on what kernel operations.
 
          Enable this option if you want to use the LatencyTOP tool
          to find out which userspace is blocking on what kernel operations.
 

+config SYSCTL_SYSCALL_CHECK
+       bool "Sysctl checks"
+       depends on SYSCTL_SYSCALL
+       ---help---
+         sys_sysctl uses binary paths that have been found challenging
+         to properly maintain and use. This enables checks that help
+         you to keep things correct.
+

 source kernel/trace/Kconfig
 
 config PROVIDE_OHCI1394_DMA_INIT
 source kernel/trace/Kconfig
 
 config PROVIDE_OHCI1394_DMA_INIT


@@ -735,6 +842,70 @@ config FIREWIRE_OHCI_REMOTE_DMA
 
          If unsure, say N.
 
 
          If unsure, say N.
 

+menuconfig BUILD_DOCSRC
+       bool "Build targets in Documentation/ tree"
+       depends on HEADERS_CHECK
+       help
+         This option attempts to build objects from the source files in the
+         kernel Documentation/ tree.
+
+         Say N if you are unsure.
+
+config DYNAMIC_PRINTK_DEBUG
+       bool "Enable dynamic printk() call support"
+       default n
+       depends on PRINTK
+       select PRINTK_DEBUG
+       help
+
+         Compiles debug level messages into the kernel, which would not
+         otherwise be available at runtime. These messages can then be
+         enabled/disabled on a per module basis. This mechanism implicitly
+         enables all pr_debug() and dev_dbg() calls. The impact of this
+         compile option is a larger kernel text size of about 2%.
+
+         Usage:
+
+         Dynamic debugging is controlled by the debugfs file,
+         dynamic_printk/modules. This file contains a list of the modules that
+         can be enabled. The format of the file is the module name, followed
+         by a set of flags that can be enabled. The first flag is always the
+         'enabled' flag. For example:
+
+               <module_name> <enabled=0/1>
+                               .
+                               .
+                               .
+
+         <module_name> : Name of the module in which the debug call resides
+         <enabled=0/1> : whether the messages are enabled or not
+
+         From a live system:
+
+               snd_hda_intel enabled=0
+               fixup enabled=0
+               driver enabled=0
+
+         Enable a module:
+
+               $echo "set enabled=1 <module_name>" > dynamic_printk/modules
+
+         Disable a module:
+
+               $echo "set enabled=0 <module_name>" > dynamic_printk/modules
+
+         Enable all modules:
+
+               $echo "set enabled=1 all" > dynamic_printk/modules
+
+         Disable all modules:
+
+               $echo "set enabled=0 all" > dynamic_printk/modules
+
+         Finally, passing "dynamic_printk" at the command line enables
+         debugging for all modules. This mode can be turned off via the above
+         disable command.
+

 source "samples/Kconfig"
 
 source "lib/Kconfig.kgdb"
 source "samples/Kconfig"
 
 source "lib/Kconfig.kgdb"