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| author | David Sterba <dsterba@suse.cz> | 2015-04-24 16:44:30 +0200 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-06-02 19:34:33 -0700 |
| commit | 13028901a4a62096e97a0fc44388ea859587f690 (patch) | |
| tree | 7cc2997b96fb7c391c144532bc4fc7b27d64ae7d /fs | |
| parent | 53e489bc8cd9dcfe95be3e422121539250aa8221 (diff) | |
| download | lwn-13028901a4a62096e97a0fc44388ea859587f690.tar.gz lwn-13028901a4a62096e97a0fc44388ea859587f690.zip | |
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')
| -rw-r--r-- | fs/btrfs/tree-defrag.c | 3 |
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; |