• Gao Xiang's avatar
    erofs: drop all vle annotations for runtime names · 0c638f70
    Gao Xiang authored
    VLE was an old informal name of fixed-sized output
    compression which came from published ATC'19 paper [1].
    
    Drop those old annotations since erofs can handle
    all encoded clusters in block-aligned basis, which
    is wider than fixed-sized output compression after
    larger clustersize feature is fully implemented.
    
    Unaligned encoding won't be considered in EROFS
    since it's not friendly to inplace I/O and perhaps
    decompression inplace.
    
    a) Fixed-sized output compression with 16KB pcluster:
      ___________________________________
     |xxxxxxxx|xxxxxxxx|xxxxxxxx|xxxxxxxx|
     |___ 0___|___ 1___|___ 2___|___ 3___| physical blocks
    
    b) Block-aligned fixed-sized input compression with
       16KB pcluster:
      ___________________________________
     |xxxxxxxx|xxxxxxxx|xxxxxxxx|xxx00000|
     |___ 0___|___ 1___|___ 2___|___ 3___| physical blocks
    
    c) Block-unaligned fixed-sized input compression with
       16KB compression unit:
      ____________________________________________
     |..xxxxxx|xxxxxxxx|xxxxxxxx|xxxxxxxx|x.......|
     |___ 0___|___ 1___|___ 2___|___ 3___|___ 4___| physical blocks
    
    Refine better names for those as well.
    
    [1] https://www.usenix.org/conference/atc19/presentation/gao
    
    Link: https://lore.kernel.org/r/20191108033733.63919-1-gaoxiang25@huawei.comReviewed-by: default avatarChao Yu <yuchao0@huawei.com>
    Signed-off-by: default avatarGao Xiang <gaoxiang25@huawei.com>
    0c638f70
zmap.c 12 KB