What:		/sys/fs/erofs/features/
Date:		November 2021
Contact:	"Huang Jianan" <huangjianan@oppo.com>
Description:	Shows all enabled kernel features.
		Supported features:
		zero_padding, compr_cfgs, big_pcluster, chunked_file,
		device_table, compr_head2, sb_chksum, ztailpacking,
		dedupe, fragments, 48bit, metabox.

What:		/sys/fs/erofs/<disk>/dir_ra_bytes
Date:		July 2025
Contact:	"Chao Yu" <chao@kernel.org>
Description:	Used to set or show readahead bytes during readdir(), by
		default the value is 16384.

		- 0: disable readahead.
