[git] CFS-devel, latest code

From: Ingo Molnar
Date: Mon Sep 24 2007 - 17:46:17 EST

The latest sched-devel.git tree can be pulled from:


Lots of scheduler updates in the past few days, done by many people.
Most importantly, the SMP latency problems reported and debugged by Mike
Galbraith should be fixed for good now.

I've also included the latest and greatest group-fairness scheduling
patch from Srivatsa Vaddagiri, which can now be used without containers
as well (in a simplified, each-uid-gets-its-fair-share mode). This
feature (CONFIG_FAIR_USER_SCHED) is now default-enabled.

Peter Zijlstra has been busy enhancing the math of the scheduler: we've
got the new 'vslice' forked-task code that should enable snappier shell
commands during load while still keeping kbuild workloads in check.

On my testsystems this codebase starts looking like something that could
be merged into v2.6.24, so please give it a good workout and let us know
if there's anything bad going on. (If this works out fine then i'll
propagate these changes back into the CFS backport, for wider testing.)


the shortlog relative to 2.6.23-rc7:

Dmitry Adamushko (8):
sched: clean up struct load_stat
sched: clean up schedstat block in dequeue_entity()
sched: sched_setscheduler() fix
sched: add set_curr_task() calls
sched: do not keep current in the tree and get rid of sched_entity::fair_key
sched: optimize task_new_fair()
sched: simplify sched_class::yield_task()
sched: rework enqueue/dequeue_entity() to get rid of set_curr_task()

Ingo Molnar (41):
sched: fix new-task method
sched: resched task in task_new_fair()
sched: small sched_debug cleanup
sched: debug: track maximum 'slice'
sched: uniform tunings
sched: use constants if !CONFIG_SCHED_DEBUG
sched: remove stat_gran
sched: remove precise CPU load
sched: remove precise CPU load calculations #2
sched: track cfs_rq->curr on !group-scheduling too
sched: cleanup: simplify cfs_rq_curr() methods
sched: uninline __enqueue_entity()/__dequeue_entity()
sched: speed up update_load_add/_sub()
sched: clean up calc_weighted()
sched: introduce se->vruntime
sched: move sched_feat() definitions
sched: optimize vruntime based scheduling
sched: simplify check_preempt() methods
sched: wakeup granularity fix
sched: add se->vruntime debugging
sched: add more vruntime statistics
sched: debug: update exec_clock only when SCHED_DEBUG
sched: remove wait_runtime limit
sched: remove wait_runtime fields and features
sched: x86: allow single-depth wchan output
sched: fix delay accounting performance regression
sched: prettify /proc/sched_debug output
sched: enhance debug output
sched: kernel/sched_fair.c whitespace cleanups
sched: fair-group sched, cleanups
sched: enable CONFIG_FAIR_GROUP_SCHED=y by default
sched debug: BKL usage statistics
sched: remove unneeded tunables
sched debug: print settings
sched debug: more width for parameter printouts
sched: entity_key() fix
sched: remove condition from set_task_cpu()
sched: remove last_min_vruntime effect
sched: undo some of the recent changes
sched: fix place_entity()
sched: fix sched_fork()

Matthias Kaehlcke (1):
sched: use list_for_each_entry_safe() in __wake_up_common()

Mike Galbraith (2):
sched: fix SMP migration latencies
sched: fix formatting of /proc/sched_debug

Peter Zijlstra (10):
sched: simplify SCHED_FEAT_* code
sched: new task placement for vruntime
sched: simplify adaptive latency
sched: clean up new task placement
sched: add tree based averages
sched: handle vruntime overflow
sched: better min_vruntime tracking
sched: add vslice
sched debug: check spread
sched: max_vruntime() simplification

Srivatsa Vaddagiri (7):
sched: group-scheduler core
sched: revert recent removal of set_curr_task()
sched: fix minor bug in yield
sched: print nr_running and load in /proc/sched_debug
sched: print &rq->cfs stats
sched: clean up code under CONFIG_FAIR_GROUP_SCHED
sched: add fair-user scheduler

arch/i386/Kconfig | 11
include/linux/sched.h | 45 +--
init/Kconfig | 21 +
kernel/sched.c | 547 +++++++++++++++++++++++++------------
kernel/sched_debug.c | 248 +++++++++++------
kernel/sched_fair.c | 692 +++++++++++++++++-------------------------------
kernel/sched_idletask.c | 5
kernel/sched_rt.c | 12
kernel/sched_stats.h | 4
kernel/sysctl.c | 22 -
kernel/user.c | 43 ++
11 files changed, 906 insertions(+), 744 deletions(-)
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