From: Ingo Molnar <mingo@...>
Subject: [git pull] scheduler changes for v2.6.25
Date: Jan 25, 4:37 pm 2008

Linus, please pull the latest scheduler git tree for v2.6.25 from:
   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched.git
it contains various enhancements to the scheduler - find the full

shortlog is below. 96 commits from 19 authors - scheduler developers

have been busy again. :-/
The scheduling behavior of the kernel to normal users should not change

over v2.6.24, but there are a good number of new features and

enhancements under the hood:
 - various instrumentation and debugging enhancements from

   Arjan van de Ven. LatencyTOP support in the scheduler is one

   example.
 - Peter Zijlstra's RT time limit and RT throttling code for the RT

   scheduling class. Both audio and RT folks have asked for this.
 - Paul E. McKenney's preemptible RCU code.
 - refcount based CPU-hotplug rework by Gautham R Shenoy. (The "Lukewarm

   IQ detected in hotplug locking" printout is now gone, forever i hope! :)
 - there's serious interest in running RT tasks on enterprise-class

   hardware, so Steven Rostedt and Gregory Haskins wrote a large number

   of enhancements to the RT scheduling class and load-balancer.
 - Peter Zijlstra's high-resolution scheduler tick code. We still have a

   HZ tick running for a few other odd things, but it's dwindling now.
 - Srivatsa Vaddagiri's next version of group scheduling. More accurate,

   more fair.
 - make printk robust against self-recursion, and use stable

   timestamps for printk-timestamps.
 - the softlockup detector will now detect hung, uninterruptible tasks

   automatically, and report them.
and a good number of other, smaller enhancements. Enjoy,
	Ingo
------------------>

Alexey Dobriyan (1):

      sched, futex: detach sched.h and futex.h
Arjan van de Ven (4):

      debug: show being-loaded/being-unloaded indicator for modules

      debug: track and print last unloaded module in the oops trace

      sched: latencytop support

      sched: keep total / count stats in addition to the max for
Dipankar Sarma (1):

      Preempt-RCU: Use softirq instead of tasklets for
Dmitry Adamushko (3):

      sched: no need for 'affine wakeup' balancing

      sched: get rid of 'new_cpu' in try_to_wake_up()

      sched: fix goto retry in pick_next_task_rt()
Gautham R Shenoy (3):

      cpu-hotplug: refcount based cpu hotplug

      cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()

      cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()
Gregory Haskins (15):

      sched: add RT-balance cpu-weight

      sched: clean up this_rq use in kernel/sched_rt.c

      sched: de-SCHED_OTHER-ize the RT path

      sched: break out search for RT tasks

      sched: RT balancing: include current CPU

      sched: pre-route RT tasks on wakeup

      sched: optimize RT affinity

      sched: wake-balance fixes

      sched: break out early if RT task cannot be migrated

      sched: RT-balance, optimize

      sched: add sched-domain roots

      sched: only balance our RT tasks within our domain

      sched: RT-balance, only adjust overload state when changing

      sched: remove some old cpuset logic

      sched: dynamically update the root-domain span/online maps
Guillaume Chazarain (2):

      sched: fix rq->clock warps on frequency changes

      sched: monitor clock underflows in /proc/sched_debug
Herbert Xu (1):

      sched: do not do cond_resched() when CONFIG_PREEMPT
Ingo Molnar (25):

      printk: make printk more robust by not allowing recursion

      sched: fix CONFIG_PRINT_TIME's reliance on sched_clock()

      sched: remove printk_clock()

      sched: remove printk_clock references from ia64

      cpu-hotplug: fix build on !CONFIG_SMP

      softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks

      sched: clean up pick_next_highest_task_rt()

      sched: clean up find_lock_lowest_rq()

      sched: clean up overlong line in kernel/sched_debug.c

      sched: clean up kernel/sched_rt.c

      sched: remove rt_overload()

      sched: remove leftover debugging

      sched: clean up pull_rt_task()

      sched: clean up schedule_balance_rt()

      sched: fix sched_rt.c:join/leave_domain

      sched: remove unused JIFFIES_TO_NS() macro

      sched: style cleanup, #2

      sched: add credits for RT balancing improvements

      sched: reactivate fork balancing

      sched: whitespace cleanups in topology.h

      sched: documentation, whitespace fixes

      sched: make PREEMPT_BKL the default

      sched: remove the !PREEMPT_BKL code

      softlockup: fix signedness

      printk: use ktime_get()
Michal Schmidt (1):

      sched: fix, always create kernel threads with normal priority
Mike Galbraith (1):

      sched: pull_rt_task() cleanup
Nick Piggin (1):

      sched: print backtrace of running tasks too
Paolo Ciarrocchi (1):

      debug: clean up kernel/profile.c
Paul E. McKenney (5):

      Preempt-RCU: reorganize RCU code into rcuclassic.c and rcupdate.c

      Preempt-RCU: fix rcu_barrier for preemptive environment.

      Preempt-RCU: implementation

      Preempt-RCU: CPU Hotplug handling

      Preempt-RCU: update RCU Documentation.
Pavel Emelyanov (1):

      uids: merge multiple error paths in alloc_uid() into one
Pavel Machek (1):

      timers: don't #error on higher HZ values
Peter Zijlstra (13):

      sched: remove do_div() from __sched_slice()

      sched: sched_rt_entity

      sched: SCHED_FIFO/SCHED_RR watchdog timer

      sched: high-res preemption tick

      sched: rt time limit

      sched: rt group scheduling

      sched: rt throttling vs no_hz

      hrtimer: clean up cpu->base locking tricks

      hrtimer: fixup the HRTIMER_CB_IRQSAFE_NO_SOFTIRQ fallback

      hrtimer: unlock hrtimer_wakeup

      sched: rt-group: reduce rescheduling

      sched: rt-watchdog: fix .rlim_max = RLIM_INFINITY

      sched: fix: don't take a mutex from interrupt context
Srivatsa Vaddagiri (5):

      sched: group scheduling code cleanup

      sched: group scheduling, minor fixes

      sched: group scheduling, change how cpu load is calculated

      sched: introduce a mutex and corresponding API to serialize access to doms_curarray

      sched: group scheduler, fix fairness of cpu bandwidth allocation for task groups
Steven Rostedt (12):

      sched: count # of queued RT tasks

      sched: track highest prio task queued

      sched: add RT task pushing

      sched: add rt-overload tracking

      sched: pull RT tasks from overloaded runqueues

      sched: push RT tasks from overloaded CPUs

      sched: disable standard balancer for RT tasks

      sched: RT-balance, avoid overloading

      sched: RT-balance, optimize cpu search

      sched: RT-balance on new task

      sched: RT-balance, replace hooks with pre/post schedule and wakeup methods

      sched: RT-balance, add new methods to sched_class
 Documentation/RCU/RTFP.txt                   |  210 +++-

 Documentation/RCU/rcu.txt                    |   19

 Documentation/RCU/torture.txt                |   11

 Documentation/cpu-hotplug.txt                |   11

 arch/arm/kernel/time.c                       |   11

 arch/ia64/kernel/setup.c                     |    4

 arch/ia64/kernel/time.c                      |   27

 arch/ia64/sn/kernel/setup.c                  |   11

 arch/mips/kernel/mips-mt-fpaff.c             |   10

 arch/powerpc/platforms/pseries/hotplug-cpu.c |    8

 arch/powerpc/platforms/pseries/rtasd.c       |    8

 arch/x86/kernel/cpu/mtrr/main.c              |    8

 arch/x86/kernel/entry_64.S                   |    6

 arch/x86/kernel/microcode.c                  |   16

 arch/x86/kernel/signal_32.c                  |    3

 arch/x86/kernel/signal_64.c                  |    3

 arch/x86/kernel/stacktrace.c                 |   27

 drivers/lguest/x86/core.c                    |    8

 drivers/s390/char/sclp_config.c              |    4

 fs/Kconfig                                   |    1

 fs/proc/base.c                               |   78 +

 include/asm-generic/resource.h               |    5

 include/asm-x86/thread_info_32.h             |    2

 include/asm-x86/thread_info_64.h             |    5

 include/linux/cpu.h                          |   17

 include/linux/debug_locks.h                  |    5

 include/linux/futex.h                        |    6

 include/linux/hardirq.h                      |    6

 include/linux/hrtimer.h                      |   14

 include/linux/init_task.h                    |    7

 include/linux/interrupt.h                    |    1

 include/linux/jiffies.h                      |    6

 include/linux/kernel.h                       |    4

 include/linux/latencytop.h                   |   44

 include/linux/notifier.h                     |    4

 include/linux/rcuclassic.h                   |  164 +++

 include/linux/rcupdate.h                     |  173 +--

 include/linux/rcupreempt.h                   |   86 +

 include/linux/rcupreempt_trace.h             |   99 +

 include/linux/sched.h                        |   83 +

 include/linux/smp_lock.h                     |   14

 include/linux/stacktrace.h                   |    3

 include/linux/topology.h                     |    5

 init/Kconfig                                 |   28

 init/main.c                                  |    1

 kernel/Kconfig.hz                            |    2

 kernel/Kconfig.preempt                       |   13

 kernel/Makefile                              |    6

 kernel/cpu.c                                 |  164 ++-

 kernel/cpuset.c                              |   14

 kernel/fork.c                                |   11

 kernel/hrtimer.c                             |  256 ++--

 kernel/kthread.c                             |   12

 kernel/latencytop.c                          |  239 ++++

 kernel/lockdep.c                             |   12

 kernel/module.c                              |   27

 kernel/posix-cpu-timers.c                    |   30

 kernel/printk.c                              |   57 -

 kernel/profile.c                             |   99 -

 kernel/rcuclassic.c                          |  575 +++++++++++

 kernel/rcupdate.c                            |  576 -----------

 kernel/rcupreempt.c                          |  953 ++++++++++++++++++

 kernel/rcupreempt_trace.c                    |  330 ++++++

 kernel/rcutorture.c                          |    6

 kernel/sched.c                               | 1384 +++++++++++++++++++--------

 kernel/sched_debug.c                         |    5

 kernel/sched_fair.c                          |  391 ++++++-

 kernel/sched_idletask.c                      |   42

 kernel/sched_rt.c                            | 1112 +++++++++++++++++++--

 kernel/softlockup.c                          |  116 ++

 kernel/stop_machine.c                        |    4

 kernel/sysctl.c                              |   77 +

 kernel/time/tick-sched.c                     |   13

 kernel/timer.c                               |    3

 kernel/user.c                                |   47

 kernel/workqueue.c                           |   35

 lib/Kconfig.debug                            |   14

 lib/kernel_lock.c                            |  123 --

 mm/oom_kill.c                                |    2

 mm/slab.c                                    |   18

 net/core/flow.c                              |    4

 81 files changed, 6262 insertions(+), 1776 deletions(-)
 [ delta patch too big to be sent to lkml ]

--