@@ -1683,6 +1683,7 @@ static void rq_online_dl(struct rq *rq)
if (rq->dl.overloaded)
dl_set_overload(rq);
+ __dl_add(&rq->rd->dl_bw, rq->dl.ac_bw);
cpudl_set_freecpu(&rq->rd->cpudl, rq->cpu);
if (rq->dl.dl_nr_running > 0)
cpudl_set(&rq->rd->cpudl, rq->cpu, rq->dl.earliest_dl.curr, 1);
@@ -1696,6 +1697,7 @@ static void rq_offline_dl(struct rq *rq)
cpudl_set(&rq->rd->cpudl, rq->cpu, 0, 0);
cpudl_clear_freecpu(&rq->rd->cpudl, rq->cpu);
+ __dl_clear(&rq->rd->dl_bw, rq->dl.ac_bw);
}
void __init init_sched_dl_class(void)
Steven Rostedt reported that we lose information about the amount of bandwidth that has been admitted to the system across operations that reconfigure scheduling domains (and are thus destructive w.r.t. root domains). Wanpeng Li also previously reported a similar problem related to hotplug, but, since hotplug operations entail scheduling domains reconfiguration, we can fix both problems at once. This patch leverages per-rq admitted bandwidth information introduced by previous commit and couple that with rq_{online,offline}_dl calls to save and restore root_domain state across scheduling domains reconfiguration. Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Reported-by: Wanpeng Li <wanpeng.li@hotmail.com> Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Juri Lelli <juri.lelli@arm.com> --- kernel/sched/deadline.c | 2 ++ 1 file changed, 2 insertions(+) -- 2.7.0