diff options
Diffstat (limited to 'block/bfq-cgroup.c')
| -rw-r--r-- | block/bfq-cgroup.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c index b50ae8ec6..569988bda 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -649,6 +649,18 @@ static void bfq_bic_update_cgroup(struct bfq_io_cq *bic, struct bio *bio) if (unlikely(!bfqd) || likely(bic->blkcg_serial_nr == serial_nr)) goto out; + /* + * If we have a non-root cgroup, we can depend on that to + * do proper throttling of writes. Turn off wbt for that + * case. + */ + if (bio_blkcg(bio) != &blkcg_root) { + struct request_queue *q = bfqd->queue; + + if (q->rq_wb) + wbt_disable(q->rq_wb); + } + bfqg = __bfq_bic_change_cgroup(bfqd, bic, bio_blkcg(bio)); bic->blkcg_serial_nr = serial_nr; out: |