Peter Zijlstra 7f1b43936f sched/rt: Fix lockdep annotation within find_lock_lowest_rq() ... Roland Dreier reported spurious, hard to trigger lockdep warnings within the scheduler - without any real lockup. This bit gives us the right clue: > [89945.640512] [<ffffffff8103fa1a>] double_lock_balance+0x5a/0x90 > [89945.640568] [<ffffffff8104c546>] push_rt_task+0xc6/0x290 if you look at that code you'll find the double_lock_balance() in question is the one in find_lock_lowest_rq() [yay for inlining]. Now find_lock_lowest_rq() has a bug.. it fails to use double_unlock_balance() in one exit path, if this results in a retry in push_rt_task() we'll call double_lock_balance() again, at which point we'll run into said lockdep confusion. Reported-by: Roland Dreier <roland@kernel.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1337282386.4281.77.camel@twins Signed-off-by: Ingo Molnar <mingo@kernel.org>		2012-06-06 16:52:26 +02:00
..
auto_group.c	sched: Clean up parameter passing of proc_sched_autogroup_set_nice()	2012-03-02 12:23:49 +01:00
auto_group.h
clock.c
core.c	sched/numa: Load balance between remote nodes	2012-06-06 16:52:25 +02:00
cpupri.c	kernel-doc: fix kernel-doc warnings in sched	2012-01-23 08:44:54 -08:00
cpupri.h
debug.c	sched/debug: Fix printing large integers on 32-bit platforms	2012-05-14 15:05:28 +02:00
fair.c	sched: Move nr_cpus_allowed out of 'struct sched_rt_entity'	2012-05-30 14:02:25 +02:00
features.h	sched: Fix more load-balancing fallout	2012-04-26 12:54:52 +02:00
idle_task.c	sched: Update documentation and comments	2012-05-07 15:04:18 +02:00
Makefile	init_task: Create generic init_task instance	2012-05-05 13:00:21 +02:00
rt.c	sched/rt: Fix lockdep annotation within find_lock_lowest_rq()	2012-06-06 16:52:26 +02:00
sched.h	sched/nohz: Fix rq->cpu_load[] calculations	2012-05-14 15:05:27 +02:00
stats.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
stats.h
stop_task.c