sched: Add USER_SCHED to feature removal list

Peter Zijlstra suggested that we remove USER_SCHED at:

   http://lkml.org/lkml/2009/3/21/67

Removing USER_SCHED removes a lot of code from the scheduler
and simplifies the code.

We already have the ability to do user based classification
which is tightened using PAM in userspace.

Schedule USER_SCHED for removal in 2.6.34

Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Serge E. Hallyn <serue@us.ibm.com>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
LKML-Reference: <20091103214544.GI5495@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index bc693fffabe0..f613df8ec7bf 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -6,6 +6,21 @@ be removed from this file.
 
 ---------------------------
 
+What:   USER_SCHED
+When:   2.6.34
+
+Why:    USER_SCHED was implemented as a proof of concept for group scheduling.
+        The effect of USER_SCHED can already be achieved from userspace with
+        the help of libcgroup. The removal of USER_SCHED will also simplify
+        the scheduler code with the removal of one major ifdef. There are also
+        issues USER_SCHED has with USER_NS. A decision was taken not to fix
+        those and instead remove USER_SCHED. Also new group scheduling
+        features will not be implemented for USER_SCHED.
+
+Who:    Dhaval Giani <dhaval@linux.vnet.ibm.com>
+
+---------------------------
+
 What:   PRISM54
 When:   2.6.34