mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
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>
This commit is contained in:
parent
ee3441b490
commit
52ee28d249
1 changed files with 11 additions and 0 deletions
|
@ -420,6 +420,7 @@ static noinline void caching_thread(struct btrfs_work *work)
|
|||
/* 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 @@ static noinline void caching_thread(struct btrfs_work *work)
|
|||
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;
|
||||
|
|
Loading…
Reference in a new issue