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authorFilipe David Borba Manana <fdmanana@gmail.com>2013-10-14 22:49:11 +0100
committerChris Mason <chris.mason@fusionio.com>2013-11-11 22:02:19 -0500
commite93ae26fe1123e9077e79cc7af8a0d42adf4812f (patch)
treeb74a3a9da256a0b624d2339ec5835b1756892b55 /fs/btrfs/tree-log.c
parent229eed4348a482c11cf8d494392305a85ed478f9 (diff)
downloadop-kernel-dev-e93ae26fe1123e9077e79cc7af8a0d42adf4812f.zip
op-kernel-dev-e93ae26fe1123e9077e79cc7af8a0d42adf4812f.tar.gz
Btrfs: optimize tree-log.c:count_inode_refs()
Avoid repeated tree searches by processing all inode ref items in a leaf at once instead of processing one at a time, followed by a path release and a tree search for a key with a decremented offset. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index d12696d..d45c04b 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1312,6 +1312,7 @@ static int count_inode_refs(struct btrfs_root *root,
break;
path->slots[0]--;
}
+process_slot:
btrfs_item_key_to_cpu(path->nodes[0], &key,
path->slots[0]);
if (key.objectid != ino ||
@@ -1332,6 +1333,10 @@ static int count_inode_refs(struct btrfs_root *root,
if (key.offset == 0)
break;
+ if (path->slots[0] > 0) {
+ path->slots[0]--;
+ goto process_slot;
+ }
key.offset--;
btrfs_release_path(path);
}
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