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Message-ID: <tip-45a5c8bad827ebb9c9798becc15bce2e804d49e0@git.kernel.org>
Date:	Wed, 4 Nov 2009 15:24:34 GMT
From:	tip-bot for Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, vatsa@...ux.vnet.ibm.com,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	dhaval@...ux.vnet.ibm.com, balbir@...ibm.com,
	bharata@...ux.vnet.ibm.com, serue@...ibm.com, tglx@...utronix.de,
	mingo@...e.hu
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 <dhaval@...ux.vnet.ibm.com>
AuthorDate: Wed, 4 Nov 2009 03:15:44 +0530
Committer:  Ingo Molnar <mingo@...e.hu>
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 <dhaval@...ux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Balbir Singh <balbir@...ibm.com>
Cc: Bharata B Rao <bharata@...ux.vnet.ibm.com>
Cc: Serge E. Hallyn <serue@...ibm.com>
Cc: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
LKML-Reference: <20091103214544.GI5495@...ux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 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 <dhaval@...ux.vnet.ibm.com>
+
+---------------------------
+
 What:	PRISM54
 When:	2.6.34
 
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