bug#50432: DF shows incorrect disk usage which include disk usage of a mounted path

[Paco Xu]

Paul, thanks for reply.

Agree, it may be related with the file system. 

I use this workaround to add `--local` and `-x` flag for `df` to avoid the 
wrong calculation. I got the workaround from 
https://github.com/moby/moby/issues/42823#issuecomment-913584814.


Best regards
Paco


在 2021/9/8 下午2:55，“Paul Eggert”<eggert@cs.ucla.edu> 写入:

    It sounds like df is reporting disk usage for the file system you're
    running your docker instance atop. In that case, there may be other uses
    of the file system, aside from the docker instance, which means df is
    reporting the correct numbers (and du is, too).

    The problem, if it is a problem, is not likely to be in df itself; it's
    likely to be in the underlying filesystem code. You can check for this
    by running 'strace df' and looking at what numbers the system calls return.
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