Btrfs: try to drop dead cow pages from ram (06a2f9fa) · Commits · e / devices / android_kernel_oneplus_sm8150

fs/btrfs/TODO

+1 −2

Original line number	Original line	Diff line number	Diff line
	@@ -6,8 +6,7 @@
	* Check compat and incompat flags on the inode		* Check compat and incompat flags on the inode
	* Get rid of struct ctree_path, limiting tree levels held at one time		* Get rid of struct ctree_path, limiting tree levels held at one time
	* Add generation number to key pointer in nodes		* Add generation number to key pointer in nodes
	* Add parent pointer back to extent map.		* Add generation number to inode
	* Implement real list of pending transactions
	* Release		* Release
	* Do real tree locking		* Do real tree locking
	* Add extent mirroring (backup copies of blocks)		* Add extent mirroring (backup copies of blocks)

fs/btrfs/extent-tree.c

+17 −0

Original line number	Original line	Diff line number	Diff line
	@@ -291,10 +291,18 @@ static int update_block_group(struct btrfs_trans_handle *trans,
	return 0;		return 0;
	}		}

			static int try_remove_page(struct address_space *mapping, unsigned long index)
			{
			int ret;
			ret = invalidate_mapping_pages(mapping, index, index);
			return ret;
			}

	int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct		int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
	btrfs_root *root)		btrfs_root *root)
	{		{
	unsigned long gang[8];		unsigned long gang[8];
			struct inode *btree_inode = root->fs_info->btree_inode;
	u64 first = 0;		u64 first = 0;
	int ret;		int ret;
	int i;		int i;
	@@ -309,6 +317,9 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, struct
	first = gang[0];		first = gang[0];
	for (i = 0; i < ret; i++) {		for (i = 0; i < ret; i++) {
	clear_radix_bit(pinned_radix, gang[i]);		clear_radix_bit(pinned_radix, gang[i]);
			try_remove_page(btree_inode->i_mapping,
			gang[i] << (PAGE_CACHE_SHIFT -
			btree_inode->i_blkbits));
	}		}
	}		}
	if (root->fs_info->block_group_cache) {		if (root->fs_info->block_group_cache) {
	@@ -600,6 +611,12 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
	*/		*/
	btrfs_release_path(root, path);		btrfs_release_path(root, path);
	BUG_ON(ins->objectid < search_start);		BUG_ON(ins->objectid < search_start);
			if (ins->objectid >= btrfs_super_total_blocks(info->disk_super)) {
			if (search_start == 0)
			return -ENOSPC;
			search_start = 0;
			goto check_failed;
			}
	for (test_block = ins->objectid;		for (test_block = ins->objectid;
	test_block < ins->objectid + num_blocks; test_block++) {		test_block < ins->objectid + num_blocks; test_block++) {
	if (test_radix_bit(&info->pinned_radix, test_block)) {		if (test_radix_bit(&info->pinned_radix, test_block)) {