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+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.
+
+What: /sys/fs/erofs/<disk>/sync_decompress
+Date: November 2021
+Contact: "Huang Jianan" <huangjianan@oppo.com>
+Description: Control strategy of sync decompression:
+
+ - 0 (default, auto): enable for readpage, and enable for
+ readahead on atomic contexts only.
+ - 1 (force on): enable for readpage and readahead.
+ - 2 (force off): disable for all situations.