sched: better rt-group documentation

Viktor was nice enough to enhance the document based on my replies to
his questions on the subject.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 7fccf09bb95a..ba3a389fab94 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -328,6 +328,13 @@ config RT_GROUP_SCHED
         depends on EXPERIMENTAL
         depends on GROUP_SCHED
         default n
+        help
+          This feature lets you explicitly allocate real CPU bandwidth
+          to users or control groups (depending on the "Basis for grouping tasks"
+          setting below. If enabled, it will also make it impossible to
+          schedule realtime tasks for non-root users until you allocate
+          realtime bandwidth for them.
+          See Documentation/sched-rt-group.txt for more information.
 
 choice
         depends on GROUP_SCHED