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Btrfs: Add readahead to the online shrinker, and a mount -o alloc_start= for testing

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-01-02 10:01:11 -05:00
parent e52ec0eb62
commit 8f662a76c6
5 changed files with 28 additions and 9 deletions
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9
fs/btrfs/extent-tree.c
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@@ -1630,11 +1630,11 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_path *path;
btrfs_set_stack_extent_refs(&extent_item, 1);
#if 0
new_hint = max(hint_byte, 16ULL * 1024 * 1024 * 1024);
new_hint = max(hint_byte, root->fs_info->alloc_start);
if (new_hint < btrfs_super_total_bytes(&info->super_copy))
hint_byte = new_hint;
#endif
WARN_ON(num_bytes < root->sectorsize);
ret = find_free_extent(trans, root, num_bytes, empty_size,
search_start, search_end, hint_byte, ins,
@@ -2239,7 +2239,7 @@ static int relocate_one_reference(struct btrfs_root *extent_root,
free_extent_buffer(eb);
path->lowest_level = level;
path->reada = 0;
path->reada = 2;
ret = btrfs_search_slot(trans, found_root, &found_key, path,
0, 1);
path->lowest_level = 0;
@@ -2372,6 +2372,7 @@ int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size)
block_group_cache = &info->block_group_cache;
path = btrfs_alloc_path();
root = root->fs_info->extent_root;
path->reada = 2;
again:
total_found = 0;