Add a configure option to group pages by mobility

[linux-2.6] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index a80bd8326bc639876ac60eaa28c2a6a501f040a0..bab643f7717f2a0be9b2b63d7c4d14acdb5a99e5 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -7,7 +7,7 @@ config DEFCONFIG_LIST
        default "/boot/config-$UNAME_RELEASE"
        default "arch/$ARCH/defconfig"
 
        default "/boot/config-$UNAME_RELEASE"
        default "arch/$ARCH/defconfig"
 

-menu "Code maturity level options"
+menu "General setup"

 
 config EXPERIMENTAL
        bool "Prompt for development and/or incomplete code/drivers"
 
 config EXPERIMENTAL
        bool "Prompt for development and/or incomplete code/drivers"


@@ -61,9 +61,6 @@ config INIT_ENV_ARG_LIMIT
          Maximum of each of the number of arguments and environment
          variables passed to init from the kernel command line.
 
          Maximum of each of the number of arguments and environment
          variables passed to init from the kernel command line.
 

-endmenu
-
-menu "General setup"

 
 config LOCALVERSION
        string "Local version - append to kernel release"
 
 config LOCALVERSION
        string "Local version - append to kernel release"


@@ -120,15 +117,6 @@ config SYSVIPC
          section 6.4 of the Linux Programmer's Guide, available from
          <http://www.tldp.org/guides.html>.
 
          section 6.4 of the Linux Programmer's Guide, available from
          <http://www.tldp.org/guides.html>.
 

-config IPC_NS
-       bool "IPC Namespaces"
-       depends on SYSVIPC
-       default n
-       help
-         Support ipc namespaces.  This allows containers, i.e. virtual
-         environments, to use ipc namespaces to provide different ipc
-         objects for different servers.  If unsure, say N.
-

 config SYSVIPC_SYSCTL
        bool
        depends on SYSVIPC
 config SYSVIPC_SYSCTL
        bool
        depends on SYSVIPC


@@ -218,13 +206,14 @@ config TASK_IO_ACCOUNTING
 
          Say N if unsure.
 
 
          Say N if unsure.
 

-config UTS_NS
-       bool "UTS Namespaces"
+config USER_NS
+       bool "User Namespaces (EXPERIMENTAL)"

        default n
        default n

+       depends on EXPERIMENTAL

        help
        help

-         Support uts namespaces.  This allows containers, i.e.
-         vservers, to use uts namespaces to provide different
-         uts info for different servers.  If unsure, say N.
+         Support user namespaces.  This allows containers, i.e.
+         vservers, to use user namespaces to provide different
+         user info for different servers.  If unsure, say N.

 
 config AUDIT
        bool "Auditing support"
 
 config AUDIT
        bool "Auditing support"


@@ -292,6 +281,27 @@ config CPUSETS
 
          Say N if unsure.
 
 
          Say N if unsure.
 

+config FAIR_GROUP_SCHED
+       bool "Fair group CPU scheduler"
+       default y
+       depends on EXPERIMENTAL
+       help
+         This feature lets CPU scheduler recognize task groups and control CPU
+         bandwidth allocation to such task groups.
+
+choice
+       depends on FAIR_GROUP_SCHED
+       prompt "Basis for grouping tasks"
+       default FAIR_USER_SCHED
+
+config FAIR_USER_SCHED
+       bool "user id"
+       help
+         This option will choose userid as the basis for grouping
+         tasks, thus providing equal CPU bandwidth to each user.
+
+endchoice
+

 config SYSFS_DEPRECATED
        bool "Create deprecated sysfs files"
        default y
 config SYSFS_DEPRECATED
        bool "Create deprecated sysfs files"
        default y


@@ -348,7 +358,7 @@ endif
 config CC_OPTIMIZE_FOR_SIZE
        bool "Optimize for size (Look out for broken compilers!)"
        default y
 config CC_OPTIMIZE_FOR_SIZE
        bool "Optimize for size (Look out for broken compilers!)"
        default y

-       depends on ARM || H8300 || EXPERIMENTAL
+       depends on ARM || H8300 || SUPERH || EXPERIMENTAL

        help
          Enabling this option will pass "-Os" instead of "-O2" to gcc
          resulting in a smaller kernel.
        help
          Enabling this option will pass "-Os" instead of "-O2" to gcc
          resulting in a smaller kernel.


@@ -476,22 +486,47 @@ config FUTEX
          run glibc-based applications correctly.
 
 config ANON_INODES
          run glibc-based applications correctly.
 
 config ANON_INODES

-       bool "Enable anonymous inode source" if EMBEDDED
-       default y
-       help
-         Anonymous inode source for pseudo-files like epoll, signalfd,
-         timerfd and eventfd.
-
-         If unsure, say Y.
+       bool

 
 config EPOLL
        bool "Enable eventpoll support" if EMBEDDED
        default y
 
 config EPOLL
        bool "Enable eventpoll support" if EMBEDDED
        default y

-       depends on ANON_INODES
+       select ANON_INODES

        help
          Disabling this option will cause the kernel to be built without
          support for epoll family of system calls.
 
        help
          Disabling this option will cause the kernel to be built without
          support for epoll family of system calls.
 

+config SIGNALFD
+       bool "Enable signalfd() system call" if EMBEDDED
+       select ANON_INODES
+       default y
+       help
+         Enable the signalfd() system call that allows to receive signals
+         on a file descriptor.
+
+         If unsure, say Y.
+
+config TIMERFD
+       bool "Enable timerfd() system call" if EMBEDDED
+       select ANON_INODES
+       depends on BROKEN
+       default y
+       help
+         Enable the timerfd() system call that allows to receive timer
+         events on a file descriptor.
+
+         If unsure, say Y.
+
+config EVENTFD
+       bool "Enable eventfd() system call" if EMBEDDED
+       select ANON_INODES
+       default y
+       help
+         Enable the eventfd() system call that allows to receive both
+         kernel notification (ie. KAIO) or userspace notifications.
+
+         If unsure, say Y.
+

 config SHMEM
        bool "Use full shmem filesystem" if EMBEDDED
        default y
 config SHMEM
        bool "Use full shmem filesystem" if EMBEDDED
        default y


@@ -524,7 +559,7 @@ config SLUB_DEBUG
 
 choice
        prompt "Choose SLAB allocator"
 
 choice
        prompt "Choose SLAB allocator"

-       default SLAB
+       default SLUB

        help
           This option allows to select a slab allocator.
 
        help
           This option allows to select a slab allocator.
 


@@ -537,7 +572,6 @@ config SLAB
          a slab allocator.
 
 config SLUB
          a slab allocator.
 
 config SLUB

-       depends on EXPERIMENTAL && !ARCH_USES_SLAB_PAGE_STRUCT

        bool "SLUB (Unqueued Allocator)"
        help
           SLUB is a slab allocator that minimizes cache line usage
        bool "SLUB (Unqueued Allocator)"
        help
           SLUB is a slab allocator that minimizes cache line usage


@@ -547,14 +581,11 @@ config SLUB
           and has enhanced diagnostics.
 
 config SLOB
           and has enhanced diagnostics.
 
 config SLOB

-#
-#      SLOB does not support SMP because SLAB_DESTROY_BY_RCU is unsupported
-#
-       depends on EMBEDDED && !SMP && !SPARSEMEM
+       depends on EMBEDDED

        bool "SLOB (Simple Allocator)"
        help
           SLOB replaces the SLAB allocator with a drastically simpler
        bool "SLOB (Simple Allocator)"
        help
           SLOB replaces the SLAB allocator with a drastically simpler

-          allocator.  SLOB is more space efficient that SLAB but does not
+          allocator.  SLOB is more space efficient than SLAB but does not

           scale well (single lock for all operations) and is also highly
           susceptible to fragmentation. SLUB can accomplish a higher object
           density. It is usually better to use SLUB instead of SLOB.
           scale well (single lock for all operations) and is also highly
           susceptible to fragmentation. SLUB can accomplish a higher object
           density. It is usually better to use SLUB instead of SLOB.


@@ -576,9 +607,20 @@ config BASE_SMALL
        default 0 if BASE_FULL
        default 1 if !BASE_FULL
 
        default 0 if BASE_FULL
        default 1 if !BASE_FULL
 

-menu "Loadable module support"
+config PAGE_GROUP_BY_MOBILITY
+       bool "Group pages based on their mobility in the page allocator"
+       def_bool y
+       help
+         The standard allocator will fragment memory over time which means
+         that high order allocations will fail even if kswapd is running. If
+         this option is set, the allocator will try and group page types
+         based on their ability to migrate or reclaim. This is a best effort
+         attempt at lowering fragmentation which a few workloads care about.
+         The loss is a more complex allocator that may perform slower. If
+         you are interested in working with large pages, say Y and set
+         /proc/sys/vm/min_free_bytes to 16374. Otherwise say N

 
 

-config MODULES
+menuconfig MODULES

        bool "Enable loadable module support"
        help
          Kernel modules are small pieces of compiled code which can
        bool "Enable loadable module support"
        help
          Kernel modules are small pieces of compiled code which can


@@ -658,8 +700,5 @@ config STOP_MACHINE
        depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
        help
          Need stop_machine() primitive.
        depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
        help
          Need stop_machine() primitive.

-endmenu

 
 

-menu "Block layer"

 source "block/Kconfig"
 source "block/Kconfig"

-endmenu