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SubjectRe: 2.4.23 + tmpfs: where's my mem?!
On Thu, 11 Dec 2003, Mario 'BitKoenig' Holbe wrote:
> > Hugh Dickins <hugh@veritas.com> writes:
> >> But the strange thing is that df's Used does not match du: they should
> >> be identical, though arrived at from different directions. I've not
>
> No, they are not identical and should not be.
>
> Unlike df, which reads the used counter from the filesystem
> meta information, du iterates over files within directories.
>
> If you have a file without a name (created, still open, all
> links removed), it does not exist in any directory but it
> does exist in the filesystem. So df should show the space
> used for it, while du should not.

Yes, of course, you and Willy are right, and the only mystery is
how I could make a mystery of it while already knowing what you've
explained well here. Thanks!

Hugh

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