From: Mike Snitzer If "ignore_discard" is specified when creating the thin pool device then discard support is disabled for that device. The pool device's status should reflect this fact rather than stating "no_discard_passdown" (which implies discards are enabled but passdown is disabled). Reported-by: Zdenek Kabelac Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon --- drivers/md/dm-thin.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) Index: linux/drivers/md/dm-thin.c =================================================================== --- linux.orig/drivers/md/dm-thin.c +++ linux/drivers/md/dm-thin.c @@ -2391,7 +2391,9 @@ static int pool_status(struct dm_target else DMEMIT("rw "); - if (pool->pf.discard_enabled && pool->pf.discard_passdown) + if (!pool->pf.discard_enabled) + DMEMIT("ignore_discard"); + else if (pool->pf.discard_passdown) DMEMIT("discard_passdown"); else DMEMIT("no_discard_passdown"); @@ -2487,7 +2489,7 @@ static struct target_type pool_target = .name = "thin-pool", .features = DM_TARGET_SINGLETON | DM_TARGET_ALWAYS_WRITEABLE | DM_TARGET_IMMUTABLE, - .version = {1, 5, 0}, + .version = {1, 6, 0}, .module = THIS_MODULE, .ctr = pool_ctr, .dtr = pool_dtr,