linux-toradex.git/kernel/sched_rt.c, branch v2.6.33.1

sched: Add pre and post wakeup hooks

2009-12-16T18:01:58+00:00

As will be apparent in the next patch, we need a pre wakeup hook
for sched_fair task migration, hence rename the post wakeup hook
and one pre wakeup.

Signed-off-by: Peter Zijlstra 
Cc: Mike Galbraith 
LKML-Reference: <20091216170518.114746117@chello.nl>
Signed-off-by: Ingo Molnar

sched: Convert rt_runtime_lock to raw_spinlock

2009-12-14T22:55:33+00:00

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra 
Acked-by: Ingo Molnar

sched: Convert rq->lock to raw_spinlock

2009-12-14T22:55:33+00:00

Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.

Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra 
Acked-by: Ingo Molnar

sched: Protect sched_rr_get_param() access to task->sched_class

2009-12-09T09:01:07+00:00

sched_rr_get_param calls
task->sched_class->get_rr_interval(task) without protection
against a concurrent sched_setscheduler() call which modifies
task->sched_class.

Serialize the access with task_rq_lock(task) and hand the rq
pointer into get_rr_interval() as it's needed at least in the
sched_fair implementation.

Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

cpumask: Simplify sched_rt.c

2009-11-04T12:16:38+00:00

find_lowest_rq() wants to call pick_optimal_cpu() on the
intersection of sched_domain_span(sd) and lowest_mask.  Rather
than doing a cpus_and into a temporary, we can open-code it.

This actually makes the code slightly clearer, IMHO.

Signed-off-by: Rusty Russell 
Acked-by: Gregory Haskins 
Cc: Steven Rostedt 
LKML-Reference: <200911031453.15350.rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21T07:53:55+00:00

By removing the need for it to know details of scheduling classes.

This allows PlugSched to define orthogonal scheduling classes.

Signed-off-by: Peter Williams 
Acked-by: Peter Zijlstra 
Cc: Mike Galbraith 
LKML-Reference: <06d1b89ee15a0eef82d7.1253496713@mudlark.pw.nest>
Signed-off-by: Ingo Molnar

sched: Rename sync arguments

2009-09-15T14:51:30+00:00

In order to extend the functions to have more than 1 flag (sync),
rename the argument to flags, and explicitly define a WF_ space for
individual flags.

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

sched: Rename select_task_rq() argument

2009-09-15T14:51:29+00:00

In order to be able to rename the sync argument, we need to rename
the current flag argument.

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

sched: Hook sched_balance_self() into sched_class::select_task_rq()

2009-09-15T14:01:04+00:00

Rather ugly patch to fully place the sched_balance_self() code
inside the fair class.

Signed-off-by: Peter Zijlstra 
LKML-Reference: 
Signed-off-by: Ingo Molnar

sched: Scale down cpu_power due to RT tasks

2009-09-04T08:09:55+00:00

Keep an average on the amount of time spend on RT tasks and use
that fraction to scale down the cpu_power for regular tasks.

Signed-off-by: Peter Zijlstra 
Tested-by: Andreas Herrmann 
Acked-by: Andreas Herrmann 
Acked-by: Gautham R Shenoy 
Cc: Balbir Singh 
LKML-Reference: <20090901083826.287778431@chello.nl>
Signed-off-by: Ingo Molnar