erofs: support inline data decompression

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Currently, we have already support tail-packing inline for
uncompressed file, let's also implement this for compressed
files to save I/Os and storage space.

Different from normal pclusters, compressed data is available
in advance because of other metadata I/Os. Therefore, they
directly move into the bypass queue without extra I/O submission.

It's the last compression feature before folio/subpage support.

Link: https://lore.kernel.org/r/20211228232919.21413-1-xiang@kernel.org
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

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Yue Hu 2021-12-29 07:29:19 +08:00 • committed by Gao Xiang

parent ab749badf9

commit cecf864d3d

2 changed files with 119 additions and 44 deletions

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139

fs/erofs/zdata.c

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24

fs/erofs/zdata.h

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