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sched: Add wrapper for checking task_struct::on_rq

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Implement task_on_rq_queued() and use it everywhere instead of
on_rq check. No functional changes.

The only exception is we do not use the wrapper in
check_for_tasks(), because it requires to export
task_on_rq_queued() in global header files. Next patch in series
would return it back, so we do not twist it from here to there.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Turner <pjt@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Kirill Tkhai <tkhai@yandex.ru>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1408528052.23412.87.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kirill Tkhai 2014-08-20 13:47:32 +04:00 • committed by Ingo Molnar
parent f36c019c79
commit da0c1e65b5
6 changed files with 76 additions and 68 deletions
Download patch file Download diff file Expand all files Collapse all files

15
kernel/sched/deadline.c
View file

@ -530,7 +530,7 @@ again:
update_rq_clock(rq);
dl_se->dl_throttled = 0;
dl_se->dl_yielded = 0;
if (p->on_rq) {
if (task_on_rq_queued(p)) {
enqueue_task_dl(rq, p, ENQUEUE_REPLENISH);
if (task_has_dl_policy(rq->curr))
check_preempt_curr_dl(rq, p, 0);
@ -1030,7 +1030,7 @@ struct task_struct *pick_next_task_dl(struct rq *rq, struct task_struct *prev)
* means a stop task can slip in, in which case we need to
* re-start task selection.
*/
if (rq->stop && rq->stop->on_rq)
if (rq->stop && task_on_rq_queued(rq->stop))
return RETRY_TASK;
}
@ -1257,7 +1257,8 @@ static struct rq *find_lock_later_rq(struct task_struct *task, struct rq *rq)
if (unlikely(task_rq(task) != rq ||
!cpumask_test_cpu(later_rq->cpu,
&task->cpus_allowed) ||
task_running(rq, task) || !task->on_rq)) {
task_running(rq, task) ||
!task_on_rq_queued(task))) {
double_unlock_balance(rq, later_rq);
later_rq = NULL;
break;
@ -1296,7 +1297,7 @@ static struct task_struct *pick_next_pushable_dl_task(struct rq *rq)
BUG_ON(task_current(rq, p));
BUG_ON(p->nr_cpus_allowed <= 1);
BUG_ON(!p->on_rq);
BUG_ON(!task_on_rq_queued(p));
BUG_ON(!dl_task(p));
return p;
@ -1443,7 +1444,7 @@ static int pull_dl_task(struct rq *this_rq)
dl_time_before(p->dl.deadline,
this_rq->dl.earliest_dl.curr))) {
WARN_ON(p == src_rq->curr);
WARN_ON(!p->on_rq);
WARN_ON(!task_on_rq_queued(p));
/*
* Then we pull iff p has actually an earlier
@ -1596,7 +1597,7 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p)
if (unlikely(p->dl.dl_throttled))
return;
if (p->on_rq && rq->curr != p) {
if (task_on_rq_queued(p) && rq->curr != p) {
#ifdef CONFIG_SMP
if (rq->dl.overloaded && push_dl_task(rq) && rq != task_rq(p))
/* Only reschedule if pushing failed */
@ -1614,7 +1615,7 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p)
static void prio_changed_dl(struct rq *rq, struct task_struct *p,
int oldprio)
{
if (p->on_rq || rq->curr == p) {
if (task_on_rq_queued(p) || rq->curr == p) {
#ifdef CONFIG_SMP
/*
* This might be too much, but unfortunately