1 files changed, 26 insertions, 41 deletions

diff --git a/init/Kconfig b/init/Kconfig
index dcef8b55011a..a97924bc5b8d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -366,10 +366,29 @@ config RESOURCE_COUNTERS
           infrastructure that works with cgroups
         depends on CGROUPS
 
+config CGROUP_MEM_RES_CTLR
+        bool "Memory Resource Controller for Control Groups"
+        depends on CGROUPS && RESOURCE_COUNTERS
+        help
+          Provides a memory resource controller that manages both page cache and
+          RSS memory.
+
+          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.
+
+          Only enable when you're ok with these trade offs and really
+          sure you need the memory resource controller.
+
 config SYSFS_DEPRECATED
+        bool
+
+config SYSFS_DEPRECATED_V2
         bool "Create deprecated sysfs files"
         depends on SYSFS
         default y
+        select SYSFS_DEPRECATED
         help
           This option creates deprecated symlinks such as the
           "device"-link, the <subsystem>:<name>-link, and the
@@ -382,17 +401,11 @@ config SYSFS_DEPRECATED
 
           If enabled, this option will also move any device structures
           that belong to a class, back into the /sys/class hierarchy, in
-          order to support older versions of udev.
-
-          If you are using a distro that was released in 2006 or later,
-          it should be safe to say N here.
+          order to support older versions of udev and some userspace
+          programs.
 
-config CGROUP_MEM_CONT
-        bool "Memory controller for cgroups"
-        depends on CGROUPS && RESOURCE_COUNTERS
-        help
-          Provides a memory controller that manages both page cache and
-          RSS memory.
+          If you are using a distro with the most recent userspace
+          packages, it should be safe to say N here.
 
 config PROC_PID_CPUSET
         bool "Include legacy /proc/<pid>/cpuset file"
@@ -852,38 +865,10 @@ source "block/Kconfig"
 config PREEMPT_NOTIFIERS
         bool
 
-choice
-        prompt "RCU implementation type:"
-        default CLASSIC_RCU
-        help
-          This allows you to choose either the classic RCU implementation
-          that is designed for best read-side performance on non-realtime
-          systems, or the preemptible RCU implementation for best latency
-          on realtime systems.  Note that some kernel preemption modes
-          will restrict your choice.
-
-          Select the default if you are unsure.
-
 config CLASSIC_RCU
-        bool "Classic RCU"
+        def_bool !PREEMPT_RCU
         help
           This option selects the classic RCU implementation that is
           designed for best read-side performance on non-realtime
-          systems.
-
-          Say Y if you are unsure.
-
-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.
-
-          Say N if you are unsure.
-
-endchoice
+          systems.  Classic RCU is the default.  Note that the
+          PREEMPT_RCU symbol is used to select/deselect this option.