Against 2.4.19-pre7-ac2

145, 165, and 175 are against 2.4.19-pre7-ac4.

166, 185, and 190 are against 2.4.19-pre8-ac5

200, 210, 220, and 230 are against 2.4.20-pre5-ac4

110-remove-wake-up-sync.patch

We do not need sync wakeups anymore, as the load balancer handles
the case fine. Remove wake_up_sync and friends and the sync flag
in the __wake_up method.

120-need_resched-abstraction.patch

Abstract away access to need_resched into set_need_resched, etc.

130-frozen-lock.patch

Fix scheduler deadlock on some platforms. I'll let DaveM (the author)
explain:

Some platforms need to grab mm->page_table_lock during switch_mm().
On the other hand code like swap_out() in mm/vmscan.c needs to hold
mm->page_table_lock during wakeups which needs to grab the runqueue
lock. This creates a conflict and the resolution chosen here is to
not hold the runqueue lock during context_switch().

The implementation is specifically a "frozen" state implemented as a
spinlock, which is held around the context_switch() call. This allows
the runqueue lock to be dropped during this time yet prevent another cpu
from running the "not switched away from yet" task.

140-sched_yield.patch

Optimize sched_yield.

145-more-sched_yield.patch

More abstractions to yield()

150-need_resched-check.patch

A new task can become runnable during schedule(). We always want to
return from scheduler with the highest priority task running, so we
should check need_resched before returning to see if we should rerun
ourselves through schedule. This used to be in the scheduler but was
removed and then readded.

160-maxrtprio-1.patch

Cleanup assumptions over what the value of MAX_RT_PRIO. No change to
object code; just replace magic numbers with defines.

165-maxrtprio.patch

Separate notion of "maximum real-time priority" from "maximum
user-space real-time priority" via MAX_RT_PRIO vs MAX_USER_RT_PRIO
defines.

166-maxrtprio.patch

Further cleanup the code and move the defines to sched.h

170-migration_thread.patch

Backport of the migration_thread migration code from 2.5. This
includes my interrupt-off bugfix and wli's new migration_init code.
The migration_thread code allows arch-independent task migration
via set_cpus_allowed and allows the creation of things like task cpu
affinity interfaces.

175-updated_migration_init.patch

Rewrite of migration_init using Erich Focht's simpler method of using
the initial migration_thread to migrate any future threads. Also
includes a fix for arches where logical != physical CPU mapping.

180-misc-stuff.patch

Lots of misc stuff, almost entiirely invariant and trivial cleanups.
Specifically:

- rename lock_task_rq -> task_rq_lock
- rename unlock_task_rq -> task_rq_lock
- cleanup lock_task_rq
- list_del_init -> list_del fix in dequeue_task
- comment cleanups and additions
- load_balance fixes and cleanups
- simple optimization (rt_task -> policy!=SCHED_OTHER)

185-more-misc-stuff.patch

More misc. cleanups and improvements:

- move sched_find_first_bit from mmu_context.h to bitops.h
as in 2.5. Why it was ever in mmu_context.h is beyond me.
- remove the RUN_CHILD_FIRST cruft from kernel/fork.c.
Pretty clear this works great; we do not need the ifdefs.
- Add comments to top of kernel/sched.c to briefly explain
new scheduler design, give credit, and update copyright.
- set_cpus_allowed optimization from Mike Kravetz: we do not
need to invoke the migration_thread's if the task is not
running; just update task->cpu.

190-documentation.patch

Add sched-coding.txt, a description of scheduler methods and
locking rules, and sched-design.txt, Ingo's original lkml
email detailing the goals, design, and implementation of the
scheduler.

200-sched-yield.patch

Fix sched_yield for good. Seriously.

210-sched-comments.patch

Glorious comments everywhere.

220-task_cpu.patch

"set_task_cpu()" and "task_cpu()" abstraction.

230-sched-misc.patch

misc. and trivial cleanups