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| author | Peter Zijlstra <peterz@infradead.org> | 2016-10-03 16:35:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-01-14 11:29:34 +0100 |
| commit | 3bed5e2166a5e433bf62162f3cd3c5174d335934 (patch) | |
| tree | 92e845b7abb4fa91f29c4fe32f92333ec139404b /kernel/sched/fair.c | |
| parent | 80f5c1b84baa8180c3c27b7e227429712cd967b6 (diff) | |
| download | blackbird-op-linux-3bed5e2166a5e433bf62162f3cd3c5174d335934.tar.gz blackbird-op-linux-3bed5e2166a5e433bf62162f3cd3c5174d335934.zip | |
sched/core: Add missing update_rq_clock() call for task_hot()
Add the update_rq_clock() call at the top of the callstack instead of
at the bottom where we find it missing, this to aid later effort to
minimize the number of update_rq_lock() calls.
WARNING: CPU: 30 PID: 194 at ../kernel/sched/sched.h:797 assert_clock_updated()
rq->clock_update_flags < RQCF_ACT_SKIP
Call Trace:
dump_stack()
__warn()
warn_slowpath_fmt()
assert_clock_updated.isra.63.part.64()
can_migrate_task()
load_balance()
pick_next_task_fair()
__schedule()
schedule()
worker_thread()
kthread()
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/fair.c')
| -rw-r--r-- | kernel/sched/fair.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 972b67622922..b3bfe3fb4e13 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8070,6 +8070,7 @@ redo: more_balance: raw_spin_lock_irqsave(&busiest->lock, flags); + update_rq_clock(busiest); /* * cur_ld_moved - load moved in current iteration @@ -8446,6 +8447,7 @@ static int active_load_balance_cpu_stop(void *data) }; schedstat_inc(sd->alb_count); + update_rq_clock(busiest_rq); p = detach_one_task(&env); if (p) { |
