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| author | Jens Axboe <axboe@fb.com> | 2014-05-20 11:49:02 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-05-20 11:49:02 -0600 |
| commit | e3a2b3f931f59d5284abd13faf8bded726884ffd (patch) | |
| tree | f5426a4745996e95afc2f01f826e846710929dc2 /block/blk-mq-tag.h | |
| parent | 64b14519e5913e8d4de9f2e5d9ef59abba3ed83d (diff) | |
| download | linux-e3a2b3f931f59d5284abd13faf8bded726884ffd.tar.gz linux-e3a2b3f931f59d5284abd13faf8bded726884ffd.tar.bz2 linux-e3a2b3f931f59d5284abd13faf8bded726884ffd.zip | |
blk-mq: allow changing of queue depth through sysfs
For request_fn based devices, the block layer exports a 'nr_requests'
file through sysfs to allow adjusting of queue depth on the fly.
Currently this returns -EINVAL for blk-mq, since it's not wired up.
Wire this up for blk-mq, so that it now also always dynamic
adjustments of the allowed queue depth for any given block device
managed by blk-mq.
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-tag.h')
| -rw-r--r-- | block/blk-mq-tag.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index e144f68ec45f..e7ff5ceeeb97 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -55,6 +55,7 @@ extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); extern void blk_mq_tag_init_last_tag(struct blk_mq_tags *tags, unsigned int *last_tag); +extern int blk_mq_tag_update_depth(struct blk_mq_tags *tags, unsigned int depth); enum { BLK_MQ_TAG_CACHE_MIN = 1, |