Btrfs: leave spinning on lookup and map the leaf (d90c7321) · Commits · 戴 / test

fs/btrfs/inode.c

+12 −0

Original line number	Original line	Diff line number	Diff line
	@@ -2493,6 +2493,7 @@ static void btrfs_read_locked_inode(struct inode *inode)

	path = btrfs_alloc_path();		path = btrfs_alloc_path();
	BUG_ON(!path);		BUG_ON(!path);
			path->leave_spinning = 1;
	memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));		memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));

	ret = btrfs_lookup_inode(NULL, root, path, &location, 0);		ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
	@@ -2502,6 +2503,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
	leaf = path->nodes[0];		leaf = path->nodes[0];
	inode_item = btrfs_item_ptr(leaf, path->slots[0],		inode_item = btrfs_item_ptr(leaf, path->slots[0],
	struct btrfs_inode_item);		struct btrfs_inode_item);
			if (!leaf->map_token)
			map_private_extent_buffer(leaf, (unsigned long)inode_item,
			sizeof(struct btrfs_inode_item),
			&leaf->map_token, &leaf->kaddr,
			&leaf->map_start, &leaf->map_len,
			KM_USER1);

	inode->i_mode = btrfs_inode_mode(leaf, inode_item);		inode->i_mode = btrfs_inode_mode(leaf, inode_item);
	inode->i_nlink = btrfs_inode_nlink(leaf, inode_item);		inode->i_nlink = btrfs_inode_nlink(leaf, inode_item);
	@@ -2539,6 +2546,11 @@ static void btrfs_read_locked_inode(struct inode *inode)
	if (!maybe_acls)		if (!maybe_acls)
	cache_no_acl(inode);		cache_no_acl(inode);

			if (leaf->map_token) {
			unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
			leaf->map_token = NULL;
			}

	btrfs_free_path(path);		btrfs_free_path(path);
	inode_item = NULL;		inode_item = NULL;