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authorDavid Sterba <dsterba@suse.cz>2015-04-24 17:44:30 +0300
committerChris Mason <clm@fb.com>2015-06-03 05:34:33 +0300
commit13028901a4a62096e97a0fc44388ea859587f690 (patch)
tree7cc2997b96fb7c391c144532bc4fc7b27d64ae7d /fs/btrfs/tree-defrag.c
parent53e489bc8cd9dcfe95be3e422121539250aa8221 (diff)
downloadlinux-13028901a4a62096e97a0fc44388ea859587f690.tar.xz
btrfs: let tree defrag work in SSD mode
Long time ago (2008) the defrag was automatic for new b-tree writes but has been disabled after performance problems. There was a leftover in tree-defrag.c that effectively stops any defragmentation on b-trees. This is a bit unexpected and IMHO undesired. The SSD mode is an optimization and defrag is supposed to work if the users asks for it. Related commits: 6702ed490ca0bb44e17131818a5a18b773957c5a Btrfs: Add run time btree defrag, and an ioctl to force btree defrag e18e4809b10e6c9efb5fe10c1ddcb4ebb690d517 Btrfs: Add mount -o ssd, which includes optimizations for seek free storage b3236e68bf86b3ae87f58984a1822369225211cb Btrfs: Leave on the tree defragger in mount -o ssd, it still helps there 9afbb0b752ef30a429c45b9de6706e28ad1a36e1 Btrfs: Disable tree defrag in SSD mode The last three commits switch the defrag+ssd off/on/off and the last one 3f157a2fd2ad731e1ed9964fecdc5f459f04a4a4 Btrfs: Online btree defragmentation fixes misses the bits from tree-defrag.c to revert to the behaviour introduced in e18e4809b10e. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/tree-defrag.c')
-rw-r--r--fs/btrfs/tree-defrag.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index a63719cc9578..a4b9c8b2d35a 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -52,9 +52,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
goto out;
- if (btrfs_test_opt(root, SSD))
- goto out;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;