diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2020-06-09 15:37:48 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-06-15 15:10:04 +0300 |
| commit | 3ea2f097b17e13a8280f1f9386c331b326a3dbef (patch) | |
| tree | 386b638bfb54cc3bcf63311ddf1915da7ee011d0 /kernel/sched/topology.c | |
| parent | b4098bfc5efb1fd7ecf40165132a1283aeea3500 (diff) | |
| download | linux-3ea2f097b17e13a8280f1f9386c331b326a3dbef.tar.xz | |
sched/fair: Fix NOHZ next idle balance
With commit:
'b7031a02ec75 ("sched/fair: Add NOHZ_STATS_KICK")'
rebalance_domains of the local cfs_rq happens before others idle cpus have
updated nohz.next_balance and its value is overwritten.
Move the update of nohz.next_balance for other idles cpus before balancing
and updating the next_balance of local cfs_rq.
Also, the nohz.next_balance is now updated only if all idle cpus got a
chance to rebalance their domains and the idle balance has not been aborted
because of new activities on the CPU. In case of need_resched, the idle
load balance will be kick the next jiffie in order to address remaining
ilb.
Fixes: b7031a02ec75 ("sched/fair: Add NOHZ_STATS_KICK")
Reported-by: Peng Liu <iwtbavbm@gmail.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Link: https://lkml.kernel.org/r/20200609123748.18636-1-vincent.guittot@linaro.org
Diffstat (limited to 'kernel/sched/topology.c')
0 files changed, 0 insertions, 0 deletions