2009-11-03 21:46:14

by Dhaval Giani

[permalink] [raw]
Subject: sched: Add USER_SCHED to feature removal list


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 <[email protected]>
---
Documentation/feature-removal-schedule.txt | 15 +++++++++++++++
1 file changed, 15 insertions(+)

Index: linux-2.6/Documentation/feature-removal-schedule.txt
===================================================================
--- linux-2.6.orig/Documentation/feature-removal-schedule.txt
+++ linux-2.6/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 <[email protected]>
+
+---------------------------
+
What: PRISM54
When: 2.6.34

--
regards,
Dhaval


2009-11-04 15:25:25

by Dhaval Giani

[permalink] [raw]
Subject: [tip:sched/core] sched: Add USER_SCHED to feature removal list

Commit-ID: 45a5c8bad827ebb9c9798becc15bce2e804d49e0
Gitweb: http://git.kernel.org/tip/45a5c8bad827ebb9c9798becc15bce2e804d49e0
Author: Dhaval Giani <[email protected]>
AuthorDate: Wed, 4 Nov 2009 03:15:44 +0530
Committer: Ingo Molnar <[email protected]>
CommitDate: Wed, 4 Nov 2009 12:40:26 +0100

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 <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Bharata B Rao <[email protected]>
Cc: Serge E. Hallyn <[email protected]>
Cc: Srivatsa Vaddagiri <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
Documentation/feature-removal-schedule.txt | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index bc693ff..f613df8 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 <[email protected]>
+
+---------------------------
+
What: PRISM54
When: 2.6.34