diff options
| -rw-r--r-- | Documentation/device-mapper/thin-provisioning.txt | 7 | ||||
| -rw-r--r-- | drivers/md/dm-thin.c | 6 |
2 files changed, 10 insertions, 3 deletions
diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt index b8a57b9cec19..883e7ca5f745 100644 --- a/Documentation/device-mapper/thin-provisioning.txt +++ b/Documentation/device-mapper/thin-provisioning.txt @@ -281,7 +281,7 @@ ii) Status <transaction id> <used metadata blocks>/<total metadata blocks> <used data blocks>/<total data blocks> <held metadata root> ro|rw|out_of_data_space [no_]discard_passdown [error|queue]_if_no_space - needs_check|- + needs_check|- metadata_low_watermark transaction id: A 64-bit number used by userspace to help synchronise with metadata @@ -328,6 +328,11 @@ ii) Status thin-pool can be made fully operational again. '-' indicates needs_check is not set. + metadata_low_watermark: + Value of metadata low watermark in blocks. The kernel sets this + value internally but userspace needs to know this value to + determine if an event was caused by crossing this threshold. + iii) Messages create_thin <dev id> diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index b900723bbd0f..c44477d7a9ea 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -3890,6 +3890,8 @@ static void pool_status(struct dm_target *ti, status_type_t type, else DMEMIT("- "); + DMEMIT("%llu ", (unsigned long long)calc_metadata_threshold(pt)); + break; case STATUSTYPE_TABLE: @@ -3979,7 +3981,7 @@ static struct target_type pool_target = { .name = "thin-pool", .features = DM_TARGET_SINGLETON | DM_TARGET_ALWAYS_WRITEABLE | DM_TARGET_IMMUTABLE, - .version = {1, 19, 0}, + .version = {1, 20, 0}, .module = THIS_MODULE, .ctr = pool_ctr, .dtr = pool_dtr, @@ -4353,7 +4355,7 @@ static void thin_io_hints(struct dm_target *ti, struct queue_limits *limits) static struct target_type thin_target = { .name = "thin", - .version = {1, 19, 0}, + .version = {1, 20, 0}, .module = THIS_MODULE, .ctr = thin_ctr, .dtr = thin_dtr, |