Messages in this thread Patch in this message | | | Date | Wed, 21 Aug 2013 17:28:18 +0200 | From | Alexander Gordeev <> | Subject | [PATCH 5/5] blk-mq: Lower minimum queue depth from 4 to 1 |
| |
There is no reason to limit minimum queue depth. Indeed, some ATA devices ask for the depth of 1.
Signed-off-by: Alexander Gordeev <agordeev@redhat.com> --- block/blk-mq-tag.c | 2 +- block/blk-mq-tag.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index e74e18e..a115862 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -456,7 +456,7 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags, tags->nr_tags = total_tags; tags->reserved_tags = reserved_tags; tags->max_cache = nr_cache; - tags->batch_move = nr_cache / 2; + tags->batch_move = max(1u, nr_cache / 2); /* * Reserved tags are first diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 716ea79..947ba2c 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -14,7 +14,7 @@ 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); enum { - BLK_MQ_TAG_CACHE_MIN = 4, + BLK_MQ_TAG_CACHE_MIN = 1, BLK_MQ_TAG_CACHE_MAX = 64, }; -- 1.7.7.6 -- Regards, Alexander Gordeev agordeev@redhat.com
| |