dm bio prison: introduce support for locking ranges of blocks
Ranges will be placed in the same cell if they overlap.
Range locking is a prerequisite for more efficient multi-block discard
support in both the cache and thin-provisioning targets.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 69de8b4..890e2ff 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -436,7 +436,8 @@
{
key->virtual = 0;
key->dev = 0;
- key->block = from_oblock(oblock);
+ key->block_begin = from_oblock(oblock);
+ key->block_end = key->block_begin + 1ULL;
}
/*