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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-27 10:34:19 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-27 10:34:19 -0300 |
| commit | 1c29f4306f557ef5d9ed515ec8881f4d1735b058 (patch) | |
| tree | 1359b9f8403af67e35bbbaae36e2b60c9bb3d2da /block | |
| parent | 5b465b045af3a649a89b8a5c5bfdece20ffc0345 (diff) | |
Linux-libre 4.7.5-gnupck-4.7.5-gnu
Diffstat (limited to 'block')
| -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 c83d90c99..32cd8ab1c 100644 --- a/block/bfq-cgroup.c +++ b/block/bfq-cgroup.c @@ -638,6 +638,18 @@ 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: |