sched/rt: Further simplify pick_rt_task()
authorKirill Tkhai <tkhai@yandex.ru>
Thu, 31 Jan 2013 14:56:17 +0000 (18:56 +0400)
committerIngo Molnar <mingo@kernel.org>
Sun, 3 Feb 2013 18:54:58 +0000 (19:54 +0100)
commit60334caf37dc7c59120b21faa625534a6fffead0
treebe8e95b454f5e24334a9b8e280ea4fe25f330d61
parentfc79e240be5aa379dd36a62158be5a5ee0e4aec7
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>
kernel/sched/rt.c