1 files changed, 136 insertions, 13 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 8a8e2d00c40e..13627191a60d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -299,6 +299,13 @@ config CGROUP_NS
           for instance virtual servers and checkpoint/restart
           jobs.
 
+config CGROUP_FREEZER
+        bool "control group freezer subsystem"
+        depends on CGROUPS
+        help
+          Provides a way to freeze and unfreeze all tasks in a
+          cgroup.
+
 config CGROUP_DEVICE
         bool "Device controller for cgroups"
         depends on CGROUPS && EXPERIMENTAL
@@ -347,7 +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
@@ -394,16 +401,20 @@ config CGROUP_MEM_RES_CTLR
         depends on CGROUPS && RESOURCE_COUNTERS
         select MM_OWNER
         help
-          Provides a memory resource controller that manages both page cache and
-          RSS memory.
+          Provides a memory resource controller that manages both anonymous
+          memory and page cache. (See Documentation/controllers/memory.txt)
 
           Note that setting this option increases fixed memory overhead
-          associated with each page of memory in the system by 4/8 bytes
-          and also increases cache misses because struct page on many 64bit
-          systems will not fit into a single cache line anymore.
+          associated with each page of memory in the system. By this,
+          20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
+          usage tracking struct at boot. Total amount of this is printed out
+          at boot.
 
           Only enable when you're ok with these trade offs and really
-          sure you need the memory resource controller.
+          sure you need the memory resource controller. Even when you enable
+          this, you can set "cgroup_disable=memory" at your boot option to
+          disable memory resource controller and you can avoid overheads.
+          (and lose benefits of memory resource contoller)
 
           This config option also selects MM_OWNER config option, which
           could in turn add some fork/exit overhead.
@@ -577,6 +588,13 @@ config KALLSYMS_ALL
 
            Say N.
 
+config KALLSYMS_STRIP_GENERATED
+        bool "Strip machine generated symbols from kallsyms"
+        depends on KALLSYMS_ALL
+        default y
+        help
+          Say N if you want kallsyms to retain even machine generated symbols.
+
 config KALLSYMS_EXTRA_PASS
         bool "Do an extra kallsyms pass"
         depends on KALLSYMS
@@ -713,6 +731,14 @@ config SHMEM
           option replaces shmem and tmpfs with the much simpler ramfs code,
           which may be appropriate on small systems without swap.
 
+config AIO
+        bool "Enable AIO support" if EMBEDDED
+        default y
+        help
+          This option enables POSIX asynchronous I/O which may by used
+          by some high performance threaded applications. Disabling
+          this option saves about 7k.
+
 config VM_EVENT_COUNTERS
         default y
         bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
@@ -722,6 +748,15 @@ config VM_EVENT_COUNTERS
           on EMBEDDED systems.  /proc/vmstat will only show page counts
           if VM event counters are disabled.
 
+config PCI_QUIRKS
+        default y
+        bool "Enable PCI quirk workarounds" if EMBEDDED
+        depends on PCI
+        help
+          This enables workarounds for various PCI chipset
+          bugs/quirks. Disable this only if your target machine is
+          unaffected by PCI quirks.
+
 config SLUB_DEBUG
         default y
         bool "Enable SLUB debugging support" if EMBEDDED
@@ -743,8 +778,7 @@ 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)"
@@ -753,7 +787,8 @@ 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
@@ -771,8 +806,16 @@ config PROFILING
           Say Y here to enable the extended profiling support mechanisms used
           by profilers such as OProfile.
 
+#
+# Place an empty function call at each tracepoint site. Can be
+# dynamically changed for a probe function.
+#
+config TRACEPOINTS
+        bool
+
 config MARKERS
         bool "Activate markers"
+        depends on TRACEPOINTS
         help
           Place an empty function call at each marker site. Can be
           dynamically changed for a probe function.
@@ -893,10 +936,90 @@ source "block/Kconfig"
 config PREEMPT_NOTIFIERS
         bool
 
+choice
+        prompt "RCU Implementation"
+        default CLASSIC_RCU
+
 config CLASSIC_RCU
-        def_bool !PREEMPT_RCU
+        bool "Classic RCU"
         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.
+          systems.
+
+          Select this option if you are unsure.
+
+config TREE_RCU
+        bool "Tree-based hierarchical RCU"
+        help
+          This option selects the RCU implementation that is
+          designed for very large SMP system with hundreds or
+          thousands of CPUs.
+
+config PREEMPT_RCU
+        bool "Preemptible RCU"
+        depends on PREEMPT
+        help
+          This option reduces the latency of the kernel by making certain
+          RCU sections preemptible. Normally RCU code is non-preemptible, if
+          this option is selected then read-only RCU sections become
+          preemptible. This helps latency, but may expose bugs due to
+          now-naive assumptions about each RCU read-side critical section
+          remaining on a given CPU through its execution.
+
+endchoice
+
+config RCU_TRACE
+        bool "Enable tracing for RCU"
+        depends on TREE_RCU || PREEMPT_RCU
+        help
+          This option provides tracing in RCU which presents stats
+          in debugfs for debugging RCU implementation.
+
+          Say Y here if you want to enable RCU tracing
+          Say N if you are unsure.
+
+config RCU_FANOUT
+        int "Tree-based hierarchical RCU fanout value"
+        range 2 64 if 64BIT
+        range 2 32 if !64BIT
+        depends on TREE_RCU
+        default 64 if 64BIT
+        default 32 if !64BIT
+        help
+          This option controls the fanout of hierarchical implementations
+          of RCU, allowing RCU to work efficiently on machines with
+          large numbers of CPUs.  This value must be at least the cube
+          root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
+          systems and up to 262,144 for 64-bit systems.
+
+          Select a specific number if testing RCU itself.
+          Take the default if unsure.
+
+config RCU_FANOUT_EXACT
+        bool "Disable tree-based hierarchical RCU auto-balancing"
+        depends on TREE_RCU
+        default n
+        help
+          This option forces use of the exact RCU_FANOUT value specified,
+          regardless of imbalances in the hierarchy.  This is useful for
+          testing RCU itself, and might one day be useful on systems with
+          strong NUMA behavior.
+
+          Without RCU_FANOUT_EXACT, the code will balance the hierarchy.
+
+          Say N if unsure.
+
+config TREE_RCU_TRACE
+        def_bool RCU_TRACE && TREE_RCU
+        select DEBUG_FS
+        help
+          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.