[PATCH v3 0/5] erofs: support tail-packing inline compressed data

[Gao Xiang <hsiangkao@linux.alibaba.com>]

Hi folks,

v2: https://lore.kernel.org/r/20211215094449.15162-1-huyue2@yulong.com
mkfs v8: https://lore.kernel.org/r/20211224012316.42929-1-hsiangkao@linux.alibaba.com

This is the 3rd version of tail-packing inline compressed data feature.
It tries to inline the tail pcluster right after the inode metadata to
save data I/O and storage space.

Take Linux 5.10.87 source code as an example:
linux-5.10.87 (erofs, uncompressed)		972570624

linux-5.10.87 (erofs, lz4hc,9 4k tailpacking)	391696384
linux-5.10.87 (erofs, lz4hc,9 8k tailpacking)	368807936
linux-5.10.87 (erofs, lz4hc,9 16k tailpacking)	345649152

linux-5.10.87 (erofs, lz4hc,9 4k vanilla)	416079872
linux-5.10.87 (erofs, lz4hc,9 8k vanilla)	395493376
linux-5.10.87 (erofs, lz4hc,9 16k vanilla)	383213568

Thanks,
Gao Xiang

changes since v2:
 - properly split patches;
 - some code cleanup.

Gao Xiang (3):
  erofs: tidy up z_erofs_lz4_decompress
  erofs: introduce z_erofs_fixup_insize
  erofs: support unaligned data decompression

Yue Hu (2):
  erofs: support inline data decompression
  erofs: add on-disk compressed tail-packing inline support

 fs/erofs/compress.h          |   4 +-
 fs/erofs/decompressor.c      | 129 ++++++++++++++++++++---------------
 fs/erofs/decompressor_lzma.c |  19 +++---
 fs/erofs/erofs_fs.h          |  10 ++-
 fs/erofs/internal.h          |   6 ++
 fs/erofs/super.c             |   3 +
 fs/erofs/sysfs.c             |   2 +
 fs/erofs/zdata.c             | 128 +++++++++++++++++++++++-----------
 fs/erofs/zdata.h             |  24 ++++++-
 fs/erofs/zmap.c              | 116 +++++++++++++++++++++++--------
 10 files changed, 299 insertions(+), 142 deletions(-)

-- 
2.24.4