DragonFly BSD
DragonFly kernel List (threaded) for 2006-01
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Re: cowloop technology

From: "Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>
Date: Tue, 10 Jan 2006 12:34:35 +0100

Erik V. Smith wrote:
ATmission Linux has a very creative feature that would be a really nice addition to DragonFly.

Yes, seems nice. Basically a union mount on the block layer. There are some issues tho:

What do you do if the lower layer gets modified?
- while running
- while not running

We don't have a generic block device layering interface yet. I'd like to have something like this before, then supporting cloop for instance would be nice as well. I know some people don't like the implementation of GEOM, but I think the basic principle is needed anyways. Some kind of generic layering abstraction for block devices.


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