Messages in this thread | | | Date | Mon, 12 Apr 1999 23:01:17 +0200 | From | Kurt Garloff <> | Subject | Re: 2.2.5:fs/super.c comment indicates stacked mounts possible? |
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On Mon, Apr 12, 1999 at 02:31:27AM -0700, Michael Hasenstein wrote: > This seems to indicate I can mount several filesystems under one mount > point? (I didn't find any further comments/code for this)
Just try to do it ... you can't. What you can do is mount a fs over non-empty subdirs of a mountpoint.
> I'm asking because I'm thinking about an overlay mount function, which > means you can mount a filesystem on top of another one on the same > mount point. Purpose: for example, I could overlay my minimal /usr > installation with a big nfs-mounted /usr filesystem, and all the files > that don't exist locally on the disk are taken (transparently) from the > nfs filesystem. The question above has not much to do with this except > that I'm curious now that I discovered that comment, but maybe some > people who're familiar with the fs-implementation could comment on the idea.
The old content disappears, if you another fs over an old one. There's no way to get the sum.
-- Dipl.Phys. Kurt Garloff <kurt@garloff.de> [Wuppertal, FRG] Plasma physics, high perf. computing [Linux-ix86,-axp, DUX] PGP key: see mailheader / key servers [Linux SCSI driver: DC390] [unhandled content-type:application/pgp-signature] | |