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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-04-12 01:50:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-05-28 09:40:23 +0200 |
| commit | 77bd39702f0b3840cea17681409270b16a3b93c0 (patch) | |
| tree | 4cbd6175cbec0492dcf244d7b4e43a02a559bdce /kernel | |
| parent | sched: Remove redundant update_runtime notifier (diff) | |
| download | linux-77bd39702f0b3840cea17681409270b16a3b93c0.tar.xz linux-77bd39702f0b3840cea17681409270b16a3b93c0.zip | |
sched: Update rq clock before migrating tasks out of dying CPU
Because the sched_class::put_prev_task() callback of rt and fair
classes are referring to the rq clock to update their runtime
statistics. There is a missing rq clock update from the CPU
hotplug notifier's entry point of the scheduler.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Turner <pjt@google.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1365724262-20142-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 79e48e6a9385..7bf0418dc60f 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4378,6 +4378,13 @@ static void migrate_tasks(unsigned int dead_cpu) */ rq->stop = NULL; + /* + * put_prev_task() and pick_next_task() sched + * class method both need to have an up-to-date + * value of rq->clock[_task] + */ + update_rq_clock(rq); + for ( ; ; ) { /* * There's this thread running, bail when that's the only |