Merge branches 'release', 'dmi' and 'misc' into release

[linux-2.6] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 0d385be682db021dccc6482f385d8bb6f30fa75e..4f4008fc73e42d2c6aa66349ba82c78c243fb2c1 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -205,6 +205,19 @@ config SLUB_DEBUG_ON
          off in a kernel built with CONFIG_SLUB_DEBUG_ON by specifying
          "slub_debug=-".
 
+config SLUB_STATS
+       default n
+       bool "Enable SLUB performance statistics"
+       depends on SLUB
+       help
+         SLUB statistics are useful to debug SLUBs allocation behavior in
+         order find ways to optimize the allocator. This should never be
+         enabled for production use since keeping statistics slows down
+         the allocator by a few percentage points. The slabinfo command
+         supports the determination of the most active slabs to figure
+         out which slabs are relevant to a particular load.
+         Try running: slabinfo -DA
+
 config DEBUG_PREEMPT
        bool "Debug preemptible kernel"
        depends on DEBUG_KERNEL && PREEMPT && (TRACE_IRQFLAGS_SUPPORT || PPC64)