Messages in this thread | | | Subject | Re: Transparent mounts | From | Andrew Hilborne <> | Date | 18 Nov 1999 21:14:39 +0000 |
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Chad Miller <cmiller@surfsouth.com> writes:
> On Wed, Nov 17, 1999 at 09:26:41PM +0000, Riley Williams wrote: > > Basically, one facility I could use is that of being able to mount two > > or more partitions on top of each other and have all the files from > > all of the partitions available for reading. This is what I call a > > transparent mount. > > It sounds a lot like (BSD's?) union mount.
It is also similar to the experimental BSD vpath. There is a paper somewhere on this. Vpaths were stored in the kernel per-user as a stack. They then worked rather like the makefile VPATH directive, indeed this is probably what inspired it.
A per-user vpath affected namei lookups. Apparently the kernel mods required were small.
-- Andrew Hilborne
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