Documentation/ABI/testing/sysfs-fs-erofs

   1 What:           /sys/fs/erofs/features/
   2 Date:           November 2021
   3 Contact:        "Huang Jianan" <huangjianan@oppo.com>
   4 Description:    Shows all enabled kernel features.
   5                 Supported features:
   6                 zero_padding, compr_cfgs, big_pcluster, chunked_file,
   7                 device_table, compr_head2, sb_chksum, ztailpacking,
   8                 dedupe, fragments.
   9
  10 What:           /sys/fs/erofs/<disk>/sync_decompress
  11 Date:           November 2021
  12 Contact:        "Huang Jianan" <huangjianan@oppo.com>
  13 Description:    Control strategy of sync decompression:
  14
  15                 - 0 (default, auto): enable for readpage, and enable for
  16                   readahead on atomic contexts only.
  17                 - 1 (force on): enable for readpage and readahead.
  18                 - 2 (force off): disable for all situations.
  19
  20 What:           /sys/fs/erofs/<disk>/drop_caches
  21 Date:           November 2024
  22 Contact:        "Guo Chunhai" <guochunhai@vivo.com>
  23 Description:    Writing to this will drop compression-related caches,
  24                 currently used to drop in-memory pclusters and cached
  25                 compressed folios:
  26
  27                 - 1 : invalidate cached compressed folios
  28                 - 2 : drop in-memory pclusters
  29                 - 3 : drop in-memory pclusters and cached compressed folios