summaryrefslogtreecommitdiff
path: root/drivers/md/dm-thin.c
diff options
context:
space:
mode:
authorMike Snitzer <snitzer@redhat.com>2012-12-21 20:23:37 +0000
committerAlasdair G Kergon <agk@redhat.com>2012-12-21 20:23:37 +0000
commit70d6c400acc386ea910c77318688541fc32e7ce8 (patch)
tree6ab32a9b9699656c8d9147b38a776f615c1c737a /drivers/md/dm-thin.c
parent4f0b70b0479101522b8645ddc1f5ee7137821db3 (diff)
dm kcopyd: add WRITE SAME support to dm_kcopyd_zero
Add WRITE SAME support to dm-io and make it accessible to dm_kcopyd_zero(). dm_kcopyd_zero() provides an asynchronous interface whereas the blkdev_issue_write_same() interface is synchronous. WRITE SAME is a SCSI command that can be leveraged for more efficient zeroing of a specified logical extent of a device which supports it. Only a single zeroed logical block is transfered to the target for each WRITE SAME and the target then writes that same block across the specified extent. The dm thin target uses this. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin.c')
-rw-r--r--drivers/md/dm-thin.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index fba378f234a5..4b940745ba9e 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2779,7 +2779,7 @@ static void thin_io_hints(struct dm_target *ti, struct queue_limits *limits)
static struct target_type thin_target = {
.name = "thin",
- .version = {1, 5, 0},
+ .version = {1, 6, 0},
.module = THIS_MODULE,
.ctr = thin_ctr,
.dtr = thin_dtr,