sh: convert /proc/cpu/aligmnent, /proc/cpu/kernel_alignment to seq_file

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

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 6cdcf38..234ceb1 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -50,6 +50,14 @@ config MAGIC_SYSRQ
          keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
          unless you really know what this hack does.
 
+config STRIP_ASM_SYMS
+       bool "Strip assembler-generated symbols during link"
+       default n
+       help
+         Strip internal assembler-generated symbols during a link (symbols
+         that look like '.Lxxx') so they don't pollute the output of
+         get_wchan() and suchlike.
+
 config UNUSED_SYMBOLS
        bool "Enable unused/obsolete exported symbols"
        default y if X86
@@ -300,7 +308,7 @@ config DEBUG_OBJECTS_ENABLE_DEFAULT
 
 config DEBUG_SLAB
        bool "Debug slab memory allocations"
-       depends on DEBUG_KERNEL && SLAB
+       depends on DEBUG_KERNEL && SLAB && !KMEMCHECK
        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
@@ -312,7 +320,7 @@ config DEBUG_SLAB_LEAK
 
 config SLUB_DEBUG_ON
        bool "SLUB debugging on by default"
-       depends on SLUB && SLUB_DEBUG
+       depends on SLUB && SLUB_DEBUG && !KMEMCHECK
        default n
        help
          Boot with debugging on by default. SLUB boots by default with
@@ -336,9 +344,55 @@ config SLUB_STATS
          out which slabs are relevant to a particular load.
          Try running: slabinfo -DA
 
+config DEBUG_KMEMLEAK
+       bool "Kernel memory leak detector"
+       depends on DEBUG_KERNEL && EXPERIMENTAL && !MEMORY_HOTPLUG && \
+               (X86 || ARM || PPC || S390)
+
+       select DEBUG_FS if SYSFS
+       select STACKTRACE if STACKTRACE_SUPPORT
+       select KALLSYMS
+       help
+         Say Y here if you want to enable the memory leak
+         detector. The memory allocation/freeing is traced in a way
+         similar to the Boehm's conservative garbage collector, the
+         difference being that the orphan objects are not freed but
+         only shown in /sys/kernel/debug/kmemleak. Enabling this
+         feature will introduce an overhead to memory
+         allocations. See Documentation/kmemleak.txt for more
+         details.
+
+         Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances
+         of finding leaks due to the slab objects poisoning.
+
+         In order to access the kmemleak file, debugfs needs to be
+         mounted (usually at /sys/kernel/debug).
+
+config DEBUG_KMEMLEAK_EARLY_LOG_SIZE
+       int "Maximum kmemleak early log entries"
+       depends on DEBUG_KMEMLEAK
+       range 200 40000
+       default 400
+       help
+         Kmemleak must track all the memory allocations to avoid
+         reporting false positives. Since memory may be allocated or
+         freed before kmemleak is initialised, an early log buffer is
+         used to store these actions. If kmemleak reports "early log
+         buffer exceeded", please increase this value.
+
+config DEBUG_KMEMLEAK_TEST
+       tristate "Simple test for the kernel memory leak detector"
+       depends on DEBUG_KMEMLEAK
+       help
+         Say Y or M here to build a test for the kernel memory leak
+         detector. This option enables a module that explicitly leaks
+         memory.
+
+         If unsure, say N.
+
 config DEBUG_PREEMPT
        bool "Debug preemptible kernel"
-       depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)
+       depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT
        default y
        help
          If you say Y here then the kernel will use a debug variant of the
@@ -440,7 +494,7 @@ config LOCKDEP
        bool
        depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
        select STACKTRACE
-       select FRAME_POINTER if !X86 && !MIPS && !PPC && !ARM_UNWIND && !S390
+       select FRAME_POINTER if !MIPS && !PPC && !ARM_UNWIND && !S390
        select KALLSYMS
        select KALLSYMS_ALL
 
@@ -608,6 +662,21 @@ config DEBUG_NOTIFIERS
          This is a relatively cheap check but if you care about maximum
          performance, say N.
 
+config DEBUG_CREDENTIALS
+       bool "Debug credential management"
+       depends on DEBUG_KERNEL
+       help
+         Enable this to turn on some debug checking for credential
+         management.  The additional code keeps track of the number of
+         pointers from task_structs to any given cred struct, and checks to
+         see that this number never exceeds the usage count of the cred
+         struct.
+
+         Furthermore, if SELinux is enabled, this also checks that the
+         security pointer in the cred struct is never seen to be invalid.
+
+         If unsure, say N.
+
 #
 # Select this config option from the architecture Kconfig, if it
 # it is preferred to always offer frame pointers as a config
@@ -680,7 +749,7 @@ config RCU_TORTURE_TEST_RUNNABLE
 
 config RCU_CPU_STALL_DETECTOR
        bool "Check for stalled CPUs delaying RCU grace periods"
-       depends on CLASSIC_RCU || TREE_RCU
+       depends on TREE_RCU || TREE_PREEMPT_RCU
        default n
        help
          This option causes RCU to printk information on which
@@ -745,6 +814,21 @@ config DEBUG_BLOCK_EXT_DEVT
 
          Say N if you are unsure.
 
+config DEBUG_FORCE_WEAK_PER_CPU
+       bool "Force weak per-cpu definitions"
+       depends on DEBUG_KERNEL
+       help
+         s390 and alpha require percpu variables in modules to be
+         defined weak to work around addressing range issue which
+         puts the following two restrictions on percpu variable
+         definitions.
+
+         1. percpu symbols must be unique whether static or not
+         2. percpu variables can't be defined inside a function
+
+         To ensure that generic code follows the above rules, this
+         option forces all percpu variables to be defined as weak.
+
 config LKDTM
        tristate "Linux Kernel Dump Test Tool Module"
        depends on DEBUG_KERNEL
@@ -964,3 +1048,5 @@ config DMA_API_DEBUG
 source "samples/Kconfig"
 
 source "lib/Kconfig.kgdb"
+
+source "lib/Kconfig.kmemcheck"