sched: default to n for GROUP_SCHED and FAIR_GROUP_SCHED

GROUP_SCHED is confirmed to cause unacceptable latencies, see:

   http://lkml.org/lkml/2008/5/2/370.

Mark it EXPERIMENTAL and default to no for now.

Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/init/Kconfig b/init/Kconfig
index fa42e6b549d3537e9b53fe31627d42f1b5137968..4c33316743f51528bc9f583f6c18ee1cadd96a08 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -324,7 +324,8 @@ config HAVE_UNSTABLE_SCHED_CLOCK
 
 config GROUP_SCHED
        bool "Group CPU scheduler"
-       default y
+       depends on EXPERIMENTAL
+       default n
        help
          This feature lets CPU scheduler recognize task groups and control CPU
          bandwidth allocation to such task groups.
@@ -332,7 +333,7 @@ config GROUP_SCHED
 config FAIR_GROUP_SCHED
        bool "Group scheduling for SCHED_OTHER"
        depends on GROUP_SCHED
-       default y
+       default GROUP_SCHED
 
 config RT_GROUP_SCHED
        bool "Group scheduling for SCHED_RR/FIFO"