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| author | Ilya Dryomov <idryomov@gmail.com> | 2018-04-16 10:32:18 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-04-16 10:38:40 +0300 |
| commit | 420efbdf4d2358dc12913298ad44d041c6ac0ed6 (patch) | |
| tree | a6d1503503086cdb3a06a8e0bca4e2d26d78a0ec /drivers/block | |
| parent | c6244b3b23771b258656445dcd212be759265b84 (diff) | |
| download | linux-420efbdf4d2358dc12913298ad44d041c6ac0ed6.tar.xz | |
rbd: adjust queue limits for "fancy" striping
In order to take full advantage of merging in ceph_file_to_extents(),
allow object set sized I/Os. If the layout is not "fancy", an object
set consists of just one object.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index e40e490ff967..6a1805858b79 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3928,7 +3928,8 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) { struct gendisk *disk; struct request_queue *q; - u64 segment_size; + unsigned int objset_bytes = + rbd_dev->layout.object_size * rbd_dev->layout.stripe_count; int err; /* create gendisk info */ @@ -3968,20 +3969,18 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) blk_queue_flag_set(QUEUE_FLAG_NONROT, q); /* QUEUE_FLAG_ADD_RANDOM is off by default for blk-mq */ - /* set io sizes to object size */ - segment_size = rbd_obj_bytes(&rbd_dev->header); - blk_queue_max_hw_sectors(q, segment_size / SECTOR_SIZE); + blk_queue_max_hw_sectors(q, objset_bytes >> SECTOR_SHIFT); q->limits.max_sectors = queue_max_hw_sectors(q); blk_queue_max_segments(q, USHRT_MAX); blk_queue_max_segment_size(q, UINT_MAX); - blk_queue_io_min(q, segment_size); - blk_queue_io_opt(q, segment_size); + blk_queue_io_min(q, objset_bytes); + blk_queue_io_opt(q, objset_bytes); /* enable the discard support */ blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); - q->limits.discard_granularity = segment_size; - blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE); - blk_queue_max_write_zeroes_sectors(q, segment_size / SECTOR_SIZE); + q->limits.discard_granularity = objset_bytes; + blk_queue_max_discard_sectors(q, objset_bytes >> SECTOR_SHIFT); + blk_queue_max_write_zeroes_sectors(q, objset_bytes >> SECTOR_SHIFT); if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC)) q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; |