int ref_mod);
static int update_reserved_extents(struct btrfs_root *root,
u64 bytenr, u64 num, int reserve);
-static int pin_down_bytes(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- u64 bytenr, u64 num_bytes, int is_data);
static int update_block_group(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, int alloc,
} else {
goto out;
}
+ btrfs_unlock_up_safe(path, 1);
btrfs_mark_buffer_dirty(path->nodes[0]);
out:
btrfs_release_path(root, path);
return -ENOMEM;
path->reada = 1;
+ path->leave_spinning = 1;
key.objectid = bytenr;
key.type = BTRFS_EXTENT_ITEM_KEY;
key.offset = num_bytes;
/* first find the extent item and update its reference count */
ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key,
path, 0, 1);
- if (ret < 0)
+ if (ret < 0) {
+ btrfs_set_path_blocking(path);
return ret;
+ }
if (ret > 0) {
WARN_ON(1);
refs = btrfs_extent_refs(l, item);
btrfs_set_extent_refs(l, item, refs + refs_to_add);
+ btrfs_unlock_up_safe(path, 1);
+
btrfs_mark_buffer_dirty(path->nodes[0]);
btrfs_release_path(root->fs_info->extent_root, path);
path->reada = 1;
+ path->leave_spinning = 1;
+
/* now insert the actual backref */
ret = insert_extent_backref(trans, root->fs_info->extent_root,
path, bytenr, parent,
clear_extent_dirty(&fs_info->pinned_extents,
bytenr, bytenr + num - 1, GFP_NOFS);
}
+ mutex_unlock(&root->fs_info->pinned_mutex);
+
while (num > 0) {
cache = btrfs_lookup_block_group(fs_info, bytenr);
BUG_ON(!cache);
u64 end;
int ret;
- mutex_lock(&root->fs_info->pinned_mutex);
while (1) {
+ mutex_lock(&root->fs_info->pinned_mutex);
ret = find_first_extent_bit(unpin, 0, &start, &end,
EXTENT_DIRTY);
if (ret)
ret = btrfs_discard_extent(root, start, end + 1 - start);
+ /* unlocks the pinned mutex */
btrfs_update_pinned_extents(root, start, end + 1 - start, 0);
clear_extent_dirty(unpin, start, end, GFP_NOFS);
- if (need_resched()) {
- mutex_unlock(&root->fs_info->pinned_mutex);
- cond_resched();
- mutex_lock(&root->fs_info->pinned_mutex);
- }
+ cond_resched();
}
mutex_unlock(&root->fs_info->pinned_mutex);
return ret;
static int pin_down_bytes(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
- u64 bytenr, u64 num_bytes, int is_data)
+ struct btrfs_path *path,
+ u64 bytenr, u64 num_bytes, int is_data,
+ struct extent_buffer **must_clean)
{
int err = 0;
struct extent_buffer *buf;
header_owner != BTRFS_DATA_RELOC_TREE_OBJECTID &&
header_transid == trans->transid &&
!btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {
- clean_tree_block(NULL, root, buf);
- btrfs_tree_unlock(buf);
- free_extent_buffer(buf);
+ *must_clean = buf;
return 1;
}
btrfs_tree_unlock(buf);
}
free_extent_buffer(buf);
pinit:
+ btrfs_set_path_blocking(path);
+ mutex_lock(&root->fs_info->pinned_mutex);
+ /* unlocks the pinned mutex */
btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
BUG_ON(err < 0);
return -ENOMEM;
path->reada = 1;
+ path->leave_spinning = 1;
ret = lookup_extent_backref(trans, extent_root, path,
bytenr, parent, root_objectid,
ref_generation, owner_objectid, 1);
refs_to_drop);
BUG_ON(ret);
btrfs_release_path(extent_root, path);
+ path->leave_spinning = 1;
ret = btrfs_search_slot(trans, extent_root,
&key, path, -1, 1);
if (ret) {
/* if refs are 0, we need to setup the path for deletion */
if (refs == 0) {
btrfs_release_path(extent_root, path);
+ path->leave_spinning = 1;
ret = btrfs_search_slot(trans, extent_root, &key, path,
-1, 1);
BUG_ON(ret);
if (refs == 0) {
u64 super_used;
u64 root_used;
+ struct extent_buffer *must_clean = NULL;
if (pin) {
- mutex_lock(&root->fs_info->pinned_mutex);
- ret = pin_down_bytes(trans, root, bytenr, num_bytes,
- owner_objectid >= BTRFS_FIRST_FREE_OBJECTID);
- mutex_unlock(&root->fs_info->pinned_mutex);
+ ret = pin_down_bytes(trans, root, path,
+ bytenr, num_bytes,
+ owner_objectid >= BTRFS_FIRST_FREE_OBJECTID,
+ &must_clean);
if (ret > 0)
mark_free = 1;
BUG_ON(ret < 0);
}
+
/* block accounting for super block */
spin_lock(&info->delalloc_lock);
super_used = btrfs_super_bytes_used(&info->super_copy);
btrfs_set_root_used(&root->root_item,
root_used - num_bytes);
spin_unlock(&info->delalloc_lock);
+
+ /*
+ * it is going to be very rare for someone to be waiting
+ * on the block we're freeing. del_items might need to
+ * schedule, so rather than get fancy, just force it
+ * to blocking here
+ */
+ if (must_clean)
+ btrfs_set_lock_blocking(must_clean);
+
ret = btrfs_del_items(trans, extent_root, path, path->slots[0],
num_to_del);
BUG_ON(ret);
btrfs_release_path(extent_root, path);
+ if (must_clean) {
+ clean_tree_block(NULL, root, must_clean);
+ btrfs_tree_unlock(must_clean);
+ free_extent_buffer(must_clean);
+ }
+
if (owner_objectid >= BTRFS_FIRST_FREE_OBJECTID) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
BUG_ON(ret);
if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID &&
owner_objectid < BTRFS_FIRST_FREE_OBJECTID) {
mutex_lock(&root->fs_info->pinned_mutex);
+
+ /* unlocks the pinned mutex */
btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
- mutex_unlock(&root->fs_info->pinned_mutex);
update_reserved_extents(root, bytenr, num_bytes, 0);
ret = 0;
} else {
path = btrfs_alloc_path();
BUG_ON(!path);
+ path->leave_spinning = 1;
ret = btrfs_insert_empty_items(trans, extent_root, path, keys,
sizes, 2);
BUG_ON(ret);
if (!path)
return -ENOMEM;
+ path->leave_spinning = 1;
ret = btrfs_insert_empty_inode(trans, root, path, objectid);
if (ret)
goto out;
projects / linux-2.6-block.git / blobdiff