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Btrfs: Let some locks go during defrag and snapshot dropping 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-08-08 10:08:58 -04:00 committed by David Woodhouse
parent 37fa704640
commit f4468e94c8
3 changed files with 14 additions and 4 deletions
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4
fs/btrfs/ctree.h
View File

@ -300,9 +300,9 @@ struct btrfs_fs_info {
struct radix_tree_root block_group_data_radix;
struct radix_tree_root extent_map_radix;
u64 extent_tree_insert[BTRFS_MAX_LEVEL * 3];
u64 extent_tree_insert[BTRFS_MAX_LEVEL * 6];
int extent_tree_insert_nr;
u64 extent_tree_prealloc[BTRFS_MAX_LEVEL * 3];
u64 extent_tree_prealloc[BTRFS_MAX_LEVEL * 6];
int extent_tree_prealloc_nr;
u64 generation;

6
fs/btrfs/extent-tree.c
View File

@ -1018,7 +1018,7 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
if (num_blocks == 0) {
fill_prealloc = 1;
num_blocks = 1;
total_needed = (min(level + 1, BTRFS_MAX_LEVEL) + 2) * 3;
total_needed = (min(level + 1, BTRFS_MAX_LEVEL)) * 6;
}
if (fill_prealloc) {
u64 first;
@ -1300,6 +1300,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
ins->objectid;
ret = update_block_group(trans, root,
ins->objectid, ins->offset, 1, 0, 0);
WARN_ON(info->extent_tree_insert_nr >
ARRAY_SIZE(info->extent_tree_insert));
BUG_ON(ret);
return 0;
}
@ -1628,7 +1630,7 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
if (wret < 0)
ret = wret;
num_walks++;
if (num_walks > 10) {
if (num_walks > 2) {
ret = -EAGAIN;
get_bh(root->node);
break;

8
fs/btrfs/transaction.c
View File

@ -354,6 +354,7 @@ int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info)
mutex_unlock(&info->fs_mutex);
btrfs_btree_balance_dirty(root);
cond_resched();
mutex_lock(&info->fs_mutex);
trans = btrfs_start_transaction(tree_root, 1);
@ -394,6 +395,12 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
ret = err;
ret = btrfs_end_transaction(trans, tree_root);
BUG_ON(ret);
mutex_unlock(&tree_root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(tree_root);
schedule();
mutex_lock(&tree_root->fs_info->fs_mutex);
}
BUG_ON(ret);
ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
@ -406,6 +413,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
kfree(dirty);
mutex_unlock(&tree_root->fs_info->fs_mutex);
btrfs_btree_balance_dirty(tree_root);
schedule();
}
return ret;
}