summaryrefslogtreecommitdiff
path: root/fs/btrfs/transaction.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/transaction.c')
-rw-r--r--fs/btrfs/transaction.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 81f7124c3051..32454d1c566f 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -40,6 +40,14 @@ static noinline void put_transaction(struct btrfs_transaction *transaction)
}
}
+static noinline void switch_commit_root(struct btrfs_root *root)
+{
+ down_write(&root->commit_root_sem);
+ free_extent_buffer(root->commit_root);
+ root->commit_root = btrfs_root_node(root);
+ up_write(&root->commit_root_sem);
+}
+
/*
* either allocate a new transaction or hop into the existing one
*/
@@ -458,8 +466,7 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans,
ret = btrfs_write_dirty_block_groups(trans, root);
BUG_ON(ret);
}
- free_extent_buffer(root->commit_root);
- root->commit_root = btrfs_root_node(root);
+ switch_commit_root(root);
return 0;
}
@@ -537,8 +544,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
btrfs_update_reloc_root(trans, root);
if (root->commit_root != root->node) {
- free_extent_buffer(root->commit_root);
- root->commit_root = btrfs_root_node(root);
+ switch_commit_root(root);
btrfs_set_root_node(&root->root_item,
root->node);
}
@@ -1002,15 +1008,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_set_root_node(&root->fs_info->tree_root->root_item,
root->fs_info->tree_root->node);
- free_extent_buffer(root->fs_info->tree_root->commit_root);
- root->fs_info->tree_root->commit_root =
- btrfs_root_node(root->fs_info->tree_root);
+ switch_commit_root(root->fs_info->tree_root);
btrfs_set_root_node(&root->fs_info->chunk_root->root_item,
root->fs_info->chunk_root->node);
- free_extent_buffer(root->fs_info->chunk_root->commit_root);
- root->fs_info->chunk_root->commit_root =
- btrfs_root_node(root->fs_info->chunk_root);
+ switch_commit_root(root->fs_info->chunk_root);
update_super_roots(root);
@@ -1050,6 +1052,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
cur_trans->commit_done = 1;
root->fs_info->last_trans_committed = cur_trans->transid;
+
wake_up(&cur_trans->commit_wait);
put_transaction(cur_trans);