erofs-utils: mkfs: introduce global compressed data deduplication
This patch introduces global compressed data deduplication to
reuse potential prefixes for each pcluster.
It also uses rolling hashing and tries to shorten the previous
compressed extent in order to explore more possibilities for
data deduplication.
Co-developed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Ziyang Zhang <ZiyangZhang@linux.alibaba.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220926152511.94832-9-hsiangkao@linux.alibaba.com
projects / platform / upstream / erofs-utils.git / commit