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| author | Jens Axboe <axboe@fb.com> | 2017-01-13 14:43:58 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-17 10:04:31 -0700 |
| commit | d34849913819a5e0cbfbe724dbe79df89278c524 (patch) | |
| tree | 71b427fa3b22b30dc2038448ec06936018adaee4 /block/blk-mq.c | |
| parent | 945ffb60c11dfb228130f3f2bdde961cecb76671 (diff) | |
| download | lwn-d34849913819a5e0cbfbe724dbe79df89278c524.tar.gz lwn-d34849913819a5e0cbfbe724dbe79df89278c524.zip | |
blk-mq-sched: allow setting of default IO scheduler
Add Kconfig entries to manage what devices get assigned an MQ
scheduler, and add a blk-mq flag for drivers to opt out of scheduling.
The latter is useful for admin type queues that still allocate a blk-mq
queue and tag set, but aren't use for normal IO.
Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 45e1707a9f86..fa1f8619bfe7 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2285,6 +2285,14 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, mutex_unlock(&all_q_mutex); put_online_cpus(); + if (!(set->flags & BLK_MQ_F_NO_SCHED)) { + int ret; + + ret = blk_mq_sched_init(q); + if (ret) + return ERR_PTR(ret); + } + return q; err_hctxs: |