sched: clean up code under CONFIG_FAIR_GROUP_SCHED

With the view of supporting user-id based fair scheduling (and not just
container-based fair scheduling), this patch renames several functions
and makes them independent of whether they are being used for container
or user-id based fair scheduling.

Also fix a problem reported by KAMEZAWA Hiroyuki (wrt allocating
less-sized array for tg->cfs_rq[] and tf->se[]).

Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 5 insertions, 6 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 11c6762a6529..ef90a154dd90 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -282,13 +282,12 @@ config CPUSETS
           Say N if unsure.
 
 config FAIR_GROUP_SCHED
-        bool "Fair group scheduler"
-        depends on EXPERIMENTAL && CONTAINERS
+        bool "Fair group cpu scheduler"
+        default n
+        depends on EXPERIMENTAL
         help
-          This option enables you to group tasks and control CPU resource
-          allocation to such groups.
-
-          Say N if unsure.
+          This feature lets cpu scheduler recognize task groups and control cpu
+          bandwidth allocation to such task groups.
 
 config SYSFS_DEPRECATED
         bool "Create deprecated sysfs files"