diff options
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 89df16dcd83f..f4dc5aa3f700 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1279,6 +1279,7 @@ int btrfs_quota_disable(struct btrfs_fs_info *fs_info) quota_root = fs_info->quota_root; fs_info->quota_root = NULL; fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; + fs_info->qgroup_drop_subtree_thres = BTRFS_MAX_LEVEL; spin_unlock(&fs_info->qgroup_lock); btrfs_free_qgroup_config(fs_info); @@ -2307,6 +2308,7 @@ int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info = trans->fs_info; int ret = 0; int level; + u8 drop_subptree_thres; struct extent_buffer *eb = root_eb; struct btrfs_path *path = NULL; @@ -2316,6 +2318,23 @@ int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans, if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) return 0; + spin_lock(&fs_info->qgroup_lock); + drop_subptree_thres = fs_info->qgroup_drop_subtree_thres; + spin_unlock(&fs_info->qgroup_lock); + + /* + * This function only gets called for snapshot drop, if we hit a high + * node here, it means we are going to change ownership for quite a lot + * of extents, which will greatly slow down btrfs_commit_transaction(). + * + * So here if we find a high tree here, we just skip the accounting and + * mark qgroup inconsistent. + */ + if (root_level >= drop_subptree_thres) { + qgroup_mark_inconsistent(fs_info); + return 0; + } + if (!extent_buffer_uptodate(root_eb)) { ret = btrfs_read_extent_buffer(root_eb, root_gen, root_level, NULL); if (ret) |