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| author | Peter Boonstoppel <pboonstoppel@nvidia.com> | 2012-08-09 15:34:47 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-09-04 14:30:30 +0200 |
| commit | a4c96ae319b8047f62dedbe1eac79e321c185749 (patch) | |
| tree | e93b18f6ca2d2a734962ee880d8e2cb7bd1e42b0 /kernel/sched/rt.c | |
| parent | 749c8814f08f12baa4a9c2812a7c6ede7d69507d (diff) | |
| download | lwn-a4c96ae319b8047f62dedbe1eac79e321c185749.tar.gz lwn-a4c96ae319b8047f62dedbe1eac79e321c185749.zip | |
sched: Unthrottle rt runqueues in __disable_runtime()
migrate_tasks() uses _pick_next_task_rt() to get tasks from the
real-time runqueues to be migrated. When rt_rq is throttled
_pick_next_task_rt() won't return anything, in which case
migrate_tasks() can't move all threads over and gets stuck in an
infinite loop.
Instead unthrottle rt runqueues before migrating tasks.
Additionally: move unthrottle_offline_cfs_rqs() to rq_offline_fair()
Signed-off-by: Peter Boonstoppel <pboonstoppel@nvidia.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Turner <pjt@google.com>
Link: http://lkml.kernel.org/r/5FBF8E85CA34454794F0F7ECBA79798F379D3648B7@HQMAIL04.nvidia.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 944cb68420e9..e0b7ba9c040f 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -691,6 +691,7 @@ balanced: * runtime - in which case borrowing doesn't make sense. */ rt_rq->rt_runtime = RUNTIME_INF; + rt_rq->rt_throttled = 0; raw_spin_unlock(&rt_rq->rt_runtime_lock); raw_spin_unlock(&rt_b->rt_runtime_lock); } |