...
> Chuck,
> If it were rounding error I should still be able to make direct comparisons
> between the results, as long as they all used the -m argument.
In my tests, with or without -x didn't make a difference:
>du -smxc yum jigdo
1 yum
48 jigdo
48 total
>du -smc yum jigdo
1 yum
48 jigdo
48 total
Your version of du does not have the bug that I was writing about. I believe versions 6.1 - 6.6 were affected.
The issue I had was that the second file/dir argument onwards was not properly tallied. So, using your example, jigdo would show a size of 1 if it were run as:
>du -smxc yum jigdo
but if you changed the command line to:
>du -smxc jigdo yum
Then jigdo would show the correct size of 48.