rcu: Allow TREE_PREEMPT_RCU on UP systems

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index 2054e048bb9844700346db4912cd33f7c92cca3d..fb19b46c00422c794fe88db0e03a10ef1a69fff4 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -453,7 +453,7 @@ config TREE_RCU
 
 config TREE_PREEMPT_RCU
        bool "Preemptible tree-based hierarchical RCU"
-       depends on PREEMPT && SMP
+       depends on PREEMPT
        help
          This option selects the RCU implementation that is
          designed for very large SMP systems with hundreds or
@@ -461,6 +461,8 @@ config TREE_PREEMPT_RCU
          is also required.  It also scales down nicely to
          smaller systems.
 
+         Select this option if you are unsure.
+
 config TINY_RCU
        bool "UP-only small-memory-footprint RCU"
        depends on !PREEMPT && !SMP
@@ -486,6 +488,14 @@ config PREEMPT_RCU
          This option enables preemptible-RCU code that is common between
          the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
 
+config RCU_STALL_COMMON
+       def_bool ( TREE_RCU || TREE_PREEMPT_RCU || RCU_TRACE )
+       help
+         This option enables RCU CPU stall code that is common between
+         the TINY and TREE variants of RCU.  The purpose is to allow
+         the tiny variants to disable RCU CPU stall warnings, while
+         making these warnings mandatory for the tree variants.
+
 config CONTEXT_TRACKING
        bool
 
@@ -717,6 +727,50 @@ config LOG_BUF_SHIFT
 config HAVE_UNSTABLE_SCHED_CLOCK
        bool
 
+#
+# For architectures that want to enable the support for NUMA-affine scheduler
+# balancing logic:
+#
+config ARCH_SUPPORTS_NUMA_BALANCING
+       bool
+
+# For architectures that (ab)use NUMA to represent different memory regions
+# all cpu-local but of different latencies, such as SuperH.
+#
+config ARCH_WANT_NUMA_VARIABLE_LOCALITY
+       bool
+
+#
+# For architectures that are willing to define _PAGE_NUMA as _PAGE_PROTNONE
+config ARCH_WANTS_PROT_NUMA_PROT_NONE
+       bool
+
+config ARCH_USES_NUMA_PROT_NONE
+       bool
+       default y
+       depends on ARCH_WANTS_PROT_NUMA_PROT_NONE
+       depends on NUMA_BALANCING
+
+config NUMA_BALANCING_DEFAULT_ENABLED
+       bool "Automatically enable NUMA aware memory/task placement"
+       default y
+       depends on NUMA_BALANCING
+       help
+         If set, autonumic NUMA balancing will be enabled if running on a NUMA
+         machine.
+
+config NUMA_BALANCING
+       bool "Memory placement aware NUMA scheduler"
+       depends on ARCH_SUPPORTS_NUMA_BALANCING
+       depends on !ARCH_WANT_NUMA_VARIABLE_LOCALITY
+       depends on SMP && NUMA && MIGRATION
+       help
+         This option adds support for automatic NUMA aware memory/task placement.
+         The mechanism is quite primitive and is based on migrating memory when
+         it is references to the node the task is running on.
+
+         This system will be inactive on UMA systems.
+
 menuconfig CGROUPS
        boolean "Control Group support"
        depends on EVENTFD
@@ -838,7 +892,7 @@ config MEMCG_SWAP_ENABLED
 config MEMCG_KMEM
        bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
        depends on MEMCG && EXPERIMENTAL
-       default n
+       depends on SLUB || SLAB
        help
          The Kernel Memory extension for Memory Resource Controller can limit
          the amount of memory used by kernel objects in the system. Those are
@@ -1025,11 +1079,9 @@ config UIDGID_CONVERTED
        # Filesystems
        depends on 9P_FS = n
        depends on AFS_FS = n
-       depends on AUTOFS4_FS = n
        depends on CEPH_FS = n
        depends on CIFS = n
        depends on CODA_FS = n
-       depends on FUSE_FS = n
        depends on GFS2_FS = n
        depends on NCP_FS = n
        depends on NFSD = n