Hi Tejun, On 13/11/2019 16:35, Tejun Heo wrote: > Hello, > > Can you please see whether the following patch fixes the issue? > This patch does fix the issue for me. Thanks, Ionela. > Thanks. > > diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h > index 48a66738143d..19394c77ed99 100644 > --- a/include/linux/blk-cgroup.h > +++ b/include/linux/blk-cgroup.h > @@ -626,7 +626,8 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q, > bis->cur.ios[rwd]++; > > u64_stats_update_end(&bis->sync); > - cgroup_rstat_updated(blkg->blkcg->css.cgroup, cpu); > + if (cgroup_subsys_on_dfl(io_cgrp_subsys)) > + cgroup_rstat_updated(blkg->blkcg->css.cgroup, cpu); > put_cpu(); > } > >
