"Tree RCU": scalable classic RCU implementation

[linux-2.6-block.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 86b00c53fadeb833d054fab64d13fb9a0e8d6fde..9dd7958a71f0d101e67e56170ed991e8ee6a171b 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -354,7 +354,7 @@ config RT_GROUP_SCHED
          setting below. If enabled, it will also make it impossible to
          schedule realtime tasks for non-root users until you allocate
          realtime bandwidth for them.
-         See Documentation/sched-rt-group.txt for more information.
+         See Documentation/scheduler/sched-rt-group.txt for more information.
 
 choice
        depends on GROUP_SCHED
@@ -771,8 +771,7 @@ config SLAB
        help
          The regular slab allocator that is established and known to work
          well in all environments. It organizes cache hot objects in
-         per cpu and per node queues. SLAB is the default choice for
-         a slab allocator.
+         per cpu and per node queues.
 
 config SLUB
        bool "SLUB (Unqueued Allocator)"
@@ -781,7 +780,8 @@ config SLUB
           instead of managing queues of cached objects (SLAB approach).
           Per cpu caching is realized using slabs of objects instead
           of queues of objects. SLUB can use memory efficiently
-          and has enhanced diagnostics.
+          and has enhanced diagnostics. SLUB is the default choice for
+          a slab allocator.
 
 config SLOB
        depends on EMBEDDED
@@ -928,10 +928,16 @@ source "block/Kconfig"
 config PREEMPT_NOTIFIERS
        bool
 
-config CLASSIC_RCU
-       def_bool !PREEMPT_RCU
+config TREE_RCU_TRACE
+       def_bool RCU_TRACE && TREE_RCU
+       select DEBUG_FS
        help
-         This option selects the classic RCU implementation that is
-         designed for best read-side performance on non-realtime
-         systems.  Classic RCU is the default.  Note that the
-         PREEMPT_RCU symbol is used to select/deselect this option.
+         This option provides tracing for the TREE_RCU implementation,
+         permitting Makefile to trivially select kernel/rcutree_trace.c.
+
+config PREEMPT_RCU_TRACE
+       def_bool RCU_TRACE && PREEMPT_RCU
+       select DEBUG_FS
+       help
+         This option provides tracing for the PREEMPT_RCU implementation,
+         permitting Makefile to trivially select kernel/rcupreempt_trace.c.