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| author | Liu Bo <bo.li.liu@oracle.com> | 2013-07-11 09:51:15 (GMT) |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-09-01 11:57:24 (GMT) |
| commit | 52ee28d249571616c80df7562bd4412ac253899a (patch) | |
| tree | 423ee82e53b79dcb322036f4a2dea7690164e311 /fs/btrfs | |
| parent | ee3441b49092000402748f5345ee0a3d4c8ac04e (diff) | |
| download | linux-52ee28d249571616c80df7562bd4412ac253899a.tar.xz | |
Btrfs: make free space caching faster with many non-inline extent references
So to cache free space, we iterate every extent item to gather free space info.
When we have say 10,000 non-inline extent refs(such as BTRFS_EXTENT_DATA_REF),
it takes quite a long time, and since inline extent refs and non-inline ones have
same objectid in their keys, we can just re-search the tree with the next address
to skip non-inline references.
(This is found by dedup feature because dedup extents can end up with many
non-inline extent refs.)
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 7bea4d2..99aa9b7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -420,6 +420,7 @@ again: /* need to make sure the commit_root doesn't disappear */ down_read(&fs_info->extent_commit_sem); +next: ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0); if (ret < 0) goto err; @@ -459,6 +460,16 @@ again: continue; } + if (key.objectid < last) { + key.objectid = last; + key.offset = 0; + key.type = BTRFS_EXTENT_ITEM_KEY; + + caching_ctl->progress = last; + btrfs_release_path(path); + goto next; + } + if (key.objectid < block_group->key.objectid) { path->slots[0]++; continue; |