diff options
| author | Josef Bacik <josef@toxicpanda.com> | 2018-06-05 17:41:23 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-06-05 17:50:46 +0200 |
| commit | 07ce213f63fbc389c8fcaefab6267b3bc0a12796 (patch) | |
| tree | a3670201907277e6305c3a93932c5f02182ff05b /drivers/block/nbd.c | |
| parent | nbd: Consistently use request pointer in debug messages. (diff) | |
| download | linux-07ce213f63fbc389c8fcaefab6267b3bc0a12796.tar.xz linux-07ce213f63fbc389c8fcaefab6267b3bc0a12796.zip | |
nbd: set discard_alignment to the granularity
Technically we should be able to get away with 0 as the
discard_alignment, but there's no way currently for the protocol to
indicate different alignments, and in real life most disks have
discard_alignment == discard_granularity. Just set our alignment to our
blocksize to make sure discards will actually work properly with 4k
drives.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index b5afa11ca465..3b7083b8ecbb 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -246,6 +246,7 @@ static void nbd_size_update(struct nbd_device *nbd) if (config->flags & NBD_FLAG_SEND_TRIM) { nbd->disk->queue->limits.discard_granularity = config->blksize; + nbd->disk->queue->limits.discard_alignment = config->blksize; blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX); } blk_queue_logical_block_size(nbd->disk->queue, config->blksize); @@ -1062,6 +1063,7 @@ static void nbd_config_put(struct nbd_device *nbd) nbd->tag_set.timeout = 0; nbd->disk->queue->limits.discard_granularity = 0; + nbd->disk->queue->limits.discard_alignment = 0; blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX); blk_queue_flag_clear(QUEUE_FLAG_DISCARD, nbd->disk->queue); @@ -1516,6 +1518,7 @@ static int nbd_dev_add(int index) blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, disk->queue); disk->queue->limits.discard_granularity = 0; + disk->queue->limits.discard_alignment = 0; blk_queue_max_discard_sectors(disk->queue, 0); blk_queue_max_segment_size(disk->queue, UINT_MAX); blk_queue_max_segments(disk->queue, USHRT_MAX); |