diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2016-10-03 16:35:32 +0200 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2017-11-20 21:15:59 +0530 |
| commit | 6351c82d2c246a23d64afaf9005651c6966a3907 (patch) | |
| tree | 922b4ae45b29be469b607bc64d8558ca91b5e9d8 /kernel | |
| parent | d996ec007f9e325ad98785478a4d1ebdc31abc1e (diff) | |
UPSTREAM: 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>
(cherry picked from commit 3bed5e2166a5e433bf62162f3cd3c5174d335934)
Change-Id: Ief5070dcce486535334dcb739ee16b989ea9df42
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
Signed-off-by: Chris Redpath <chris.redpath@arm.com>
Diffstat (limited to 'kernel')
| -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 a52877523964..9f9123464b7c 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8993,6 +8993,7 @@ redo: more_balance: raw_spin_lock_irqsave(&busiest->lock, flags); + update_rq_clock(busiest); /* * cur_ld_moved - load moved in current iteration @@ -9390,6 +9391,7 @@ 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) { |