mm: Kconfig: reorganize misplaced mm options

[linux-2.6-block.git] / mm / Kconfig.debug

diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 5bd5bb097252ac6f153ee2e0009350f4db8e7d0e..197eb287bf828cc28c9207573c4d2fcfb42b00bf 100644 (file)
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -45,6 +45,37 @@ config DEBUG_PAGEALLOC_ENABLE_DEFAULT
          Enable debug page memory allocations by default? This value
          can be overridden by debug_pagealloc=off|on.
 
+config DEBUG_SLAB
+       bool "Debug slab memory allocations"
+       depends on DEBUG_KERNEL && SLAB
+       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
+         memory. This can make kmalloc/kfree-intensive workloads much slower.
+
+config SLUB_DEBUG
+       default y
+       bool "Enable SLUB debugging support" if EXPERT
+       depends on SLUB && SYSFS
+       help
+         SLUB has extensive debug support features. Disabling these can
+         result in significant savings in code size. This also disables
+         SLUB sysfs support. /sys/slab will not exist and there will be
+         no support for cache validation etc.
+
+config SLUB_DEBUG_ON
+       bool "SLUB debugging on by default"
+       depends on SLUB && SLUB_DEBUG
+       default n
+       help
+         Boot with debugging on by default. SLUB boots by default with
+         the runtime debug capabilities switched off. Enabling this is
+         equivalent to specifying the "slub_debug" parameter on boot.
+         There is no support for more fine grained debug control like
+         possible with slub_debug=xxx. SLUB debugging may be switched
+         off in a kernel built with CONFIG_SLUB_DEBUG_ON by specifying
+         "slub_debug=-".
+
 config PAGE_OWNER
        bool "Track page owner"
        depends on DEBUG_KERNEL && STACKTRACE_SUPPORT