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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-11-23 01:35:55 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-11-23 01:35:55 -0300 |
| commit | d26f4ddb48463e2ff798859505af1cc520e75685 (patch) | |
| tree | a1268534c14d9a7db61b4758ac72c33a3c7712bb /block/cfq-iosched.c | |
| parent | 3326a1803802aa4730d32304b003f50720996b31 (diff) | |
Linux-libre 4.8.10-gnupck-4.8.10-gnu
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | block/cfq-iosched.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 5e24d8803..f336dcbed 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3771,9 +3771,11 @@ static void check_blkcg_changed(struct cfq_io_cq *cic, struct bio *bio) struct cfq_data *cfqd = cic_to_cfqd(cic); struct cfq_queue *cfqq; uint64_t serial_nr; + bool nonroot_cg; rcu_read_lock(); serial_nr = bio_blkcg(bio)->css.serial_nr; + nonroot_cg = bio_blkcg(bio) != &blkcg_root; rcu_read_unlock(); /* @@ -3784,6 +3786,17 @@ static void check_blkcg_changed(struct cfq_io_cq *cic, struct bio *bio) return; /* + * 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 (nonroot_cg) { + struct request_queue *q = cfqd->queue; + + wbt_disable(q->rq_wb); + } + + /* * Drop reference to queues. New queues will be assigned in new * group upon arrival of fresh requests. */ |