Messages in this thread | | | Date | Thu, 11 Dec 2003 15:39:36 +0000 (GMT) | From | Hugh Dickins <> | Subject | Re: 2.4.23 + tmpfs: where's my mem?! |
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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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