Commit-ID: 60334caf37dc7c59120b21faa625534a6fffead0 Gitweb: http://git.kernel.org/tip/60334caf37dc7c59120b21faa625534a6fffead0 Author: Kirill Tkhai <tkhai@xxxxxxxxx> AuthorDate: Thu, 31 Jan 2013 18:56:17 +0400 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Sun, 3 Feb 2013 19:54:58 +0100 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@xxxxxxxxx> Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CC: linux-rt-users <linux-rt-users@xxxxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/70871359644177@xxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- kernel/sched/rt.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 94abca4..c25de14 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
