Luca Abeni 5aa5050787 sched/deadline: Fix migration of SCHED_DEADLINE tasks ... Commit: 9d51426242 ("sched/deadline: Reduce rq lock contention by eliminating locking of non-feasible target") broke select_task_rq_dl() and find_lock_later_rq(), because it introduced a comparison between the local task's deadline and dl.earliest_dl.curr of the remote queue. However, if the remote runqueue does not contain any SCHED_DEADLINE task its earliest_dl.curr is 0 (always smaller than the deadline of the local task) and the remote runqueue is not selected for pushing. As a result, if an application creates multiple SCHED_DEADLINE threads, they will never be pushed to runqueues that do not already contain SCHED_DEADLINE tasks. This patch fixes the issue by checking if dl.dl_nr_running == 0. Signed-off-by: Luca Abeni <luca.abeni@unitn.it> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wanpeng Li <wanpeng.li@linux.intel.com> Fixes: 9d51426242 ("sched/deadline: Reduce rq lock contention by eliminating locking of non-feasible target") Link: http://lkml.kernel.org/r/1444982781-15608-1-git-send-email-luca.abeni@unitn.it Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-10-20 10:13:36 +02:00
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bpf
configs
debug
events	perf: Fix races in computing the header sizes	2015-09-18 09:20:26 +02:00
gcov
irq	genirq: Fix handle_bad_irq kerneldoc comment	2015-10-09 17:17:30 +02:00
livepatch
locking	locking/lockdep: Fix hlock->pin_count reset on lock stack rebuilds	2015-09-23 09:48:53 +02:00
power
printk
rcu	rcu: Suppress lockdep false positive for rcp->exp_funnel_mutex	2015-09-20 21:01:22 -07:00
sched	sched/deadline: Fix migration of SCHED_DEADLINE tasks	2015-10-20 10:13:36 +02:00
time	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-10-03 10:51:41 -04:00
trace
.gitignore
acct.c
async.c
audit_fsnotify.c
audit_tree.c
audit_watch.c
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup_freezer.c
cgroup_pids.c
cgroup.c	Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"	2015-09-16 11:51:12 -04:00
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delayacct.c
dma.c
elfcore.c
exec_domain.c
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extable.c
fork.c	Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"	2015-09-16 11:51:12 -04:00
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futex_compat.c
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utsname.c
watchdog.c
workqueue_internal.h
workqueue.c