summaryrefslogtreecommitdiffstats
path: root/kernel/sched/sched-pelt.h
diff options
context:
space:
mode:
authorVincent Guittot <vincent.guittot@linaro.org>2020-03-06 14:52:57 +0100
committerPeter Zijlstra <peterz@infradead.org>2020-03-20 13:06:18 +0100
commitfe61468b2cbc2b7ce5f8d3bf32ae5001d4c434e9 (patch)
treee4b00d3efde65edd7f57a1f2115012f19830ebac /kernel/sched/sched-pelt.h
parent14533a16c46db70b8a75eda8fa633c25ac446d81 (diff)
downloadlinux-fe61468b2cbc2b7ce5f8d3bf32ae5001d4c434e9.tar.bz2
sched/fair: Fix enqueue_task_fair warning
When a cfs rq is throttled, the latter and its child are removed from the leaf list but their nr_running is not changed which includes staying higher than 1. When a task is enqueued in this throttled branch, the cfs rqs must be added back in order to ensure correct ordering in the list but this can only happens if nr_running == 1. When cfs bandwidth is used, we call unconditionnaly list_add_leaf_cfs_rq() when enqueuing an entity to make sure that the complete branch will be added. Similarly unthrottle_cfs_rq() can stop adding cfs in the list when a parent is throttled. Iterate the remaining entity to ensure that the complete branch will be added in the list. Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: stable@vger.kernel.org Cc: stable@vger.kernel.org #v5.1+ Link: https://lkml.kernel.org/r/20200306135257.25044-1-vincent.guittot@linaro.org
Diffstat (limited to 'kernel/sched/sched-pelt.h')
0 files changed, 0 insertions, 0 deletions