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| author | Kirill Tkhai <tkhai@yandex.ru> | 2013-01-31 15:56:17 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-02-03 19:54:58 +0100 |
| commit | 60334caf37dc7c59120b21faa625534a6fffead0 (patch) | |
| tree | be8e95b454f5e24334a9b8e280ea4fe25f330d61 /kernel/sched/rt.c | |
| parent | sched/rt: Do not account zero delta_exec in update_curr_rt() (diff) | |
| download | linux-60334caf37dc7c59120b21faa625534a6fffead0.tar.xz linux-60334caf37dc7c59120b21faa625534a6fffead0.zip | |
sched/rt: Further simplify pick_rt_task()
Function next_prio() has been removed and pull_rt_task() is the
only user of pick_next_highest_task_rt() at the moment.
pull_rt_task is not interested in p->nr_cpus_allowed, its only
interest is the fact that cpu is allowed to execute p. If
nr_cpus_allowed == 1, cpu != task_cpu(p) and cpu is allowed then
it means that task p is in the middle of the migration
techniques; the task waits until it is moved by migration
thread. So, lets pull it earlier.
Signed-off-by: Kirill V Tkhai <tkhai@yandex.ru>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
CC: linux-rt-users <linux-rt-users@vger.kernel.org>
Link: http://lkml.kernel.org/r/70871359644177@web16d.yandex.ru
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 94abca4d9cf5..c25de141c576 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1427,8 +1427,7 @@ static void put_prev_task_rt(struct rq *rq, struct task_struct *p) static int pick_rt_task(struct rq *rq, struct task_struct *p, int cpu) { if (!task_running(rq, p) && - (cpu < 0 || cpumask_test_cpu(cpu, tsk_cpus_allowed(p))) && - (p->nr_cpus_allowed > 1)) + cpumask_test_cpu(cpu, tsk_cpus_allowed(p))) return 1; return 0; } |