Kirill Tkhai f3a7e1a9c4 sched/dl: Fix preemption checks ... 1) switched_to_dl() check is wrong. We reschedule only if rq->curr is deadline task, and we do not reschedule if it's a lower priority task. But we must always preempt a task of other classes. 2) dl_task_timer(): Policy does not change in case of priority inheritance. rt_mutex_setprio() changes prio, while policy remains old. So we lose some balancing logic in dl_task_timer() and switched_to_dl() when we check policy instead of priority. Boosted task may be rq->curr. (I didn't change switched_from_dl() because no check is necessary there at all). I've looked at this place(switched_to_dl) several times and even fixed this function, but found just now... I suppose some performance tests may work better after this. Signed-off-by: Kirill Tkhai <ktkhai@parallels.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1413909356.19914.128.camel@tkhai Signed-off-by: Ingo Molnar <mingo@kernel.org>		2014-10-28 10:46:10 +01:00
..
auto_group.c
auto_group.h
clock.c
completion.c
core.c	sched: stop the unbound recursion in preempt_schedule_context()	2014-10-28 10:46:05 +01:00
cpuacct.c
cpuacct.h
cpudeadline.c
cpudeadline.h
cpupri.c
cpupri.h
cputime.c
deadline.c	sched/dl: Fix preemption checks	2014-10-28 10:46:10 +01:00
debug.c
fair.c	sched/fair: Fix division by zero sysctl_numa_balancing_scan_size	2014-10-28 10:46:04 +01:00
features.h
idle_task.c
idle.c
Makefile
proc.c
rt.c
sched.h
stats.c
stats.h
stop_task.c
wait.c