1 files changed, 4 insertions, 15 deletions

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index bcb143396fe0..2378ee88b1e8 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -33,16 +33,6 @@
 #define DATA_DEV_BLOCK_SIZE_MAX_SECTORS (1024 * 1024 * 1024 >> SECTOR_SHIFT)
 
 /*
- * The metadata device is currently limited in size.  The limitation is
- * checked lower down in dm-space-map-metadata, but we also check it here
- * so we can fail early.
- *
- * We have one block of index, which can hold 255 index entries.  Each
- * index entry contains allocation info about 16k metadata blocks.
- */
-#define METADATA_DEV_MAX_SECTORS (255 * (1 << 14) * (THIN_METADATA_BLOCK_SIZE / (1 << SECTOR_SHIFT)))
-
-/*
  * Device id is restricted to 24 bits.
  */
 #define MAX_DEV_ID ((1 << 24) - 1)
@@ -1736,6 +1726,7 @@ static int pool_ctr(struct dm_target *ti, unsigned argc, char **argv)
         dm_block_t low_water_blocks;
         struct dm_dev *metadata_dev;
         sector_t metadata_dev_size;
+        char b[BDEVNAME_SIZE];
 
         /*
          * FIXME Remove validation from scope of lock.
@@ -1757,11 +1748,9 @@ static int pool_ctr(struct dm_target *ti, unsigned argc, char **argv)
         }
 
         metadata_dev_size = i_size_read(metadata_dev->bdev->bd_inode) >> SECTOR_SHIFT;
-        if (metadata_dev_size > METADATA_DEV_MAX_SECTORS) {
-                ti->error = "Metadata device is too large";
-                r = -EINVAL;
-                goto out_metadata;
-        }
+        if (metadata_dev_size > THIN_METADATA_MAX_SECTORS_WARNING)
+                DMWARN("Metadata device %s is larger than %u sectors: excess space will not be used.",
+                       bdevname(metadata_dev->bdev, b), THIN_METADATA_MAX_SECTORS);
 
         r = dm_get_device(ti, argv[1], FMODE_READ | FMODE_WRITE, &data_dev);
         if (r) {