Btrfs: Bring back mount -o ssd optimizations
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ae22d01..16fb6bb 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -578,6 +578,11 @@
map_tree = &root->fs_info->mapping_tree;
map_length = length;
ret = btrfs_map_block(map_tree, logical, &physical, &map_length, &dev);
+ if (map_length < length) {
+ printk("mapping failed logical %Lu bio len %Lu physical %Lu "
+ "len %Lu\n", logical, length, physical, map_length);
+ BUG();
+ }
BUG_ON(map_length < length);
bio->bi_sector = physical >> 9;
bio->bi_bdev = dev->bdev;