Re: [uml-devel] more on COW (long)

Re: [uml-devel] more on COW (long)

[James W McMechan]

> Why do you need loop devices?  Doing COW in the UML kernel can deal
with ubd
> block devices instead. This means chewing up two ubd devices for each
COW
> device, though, and I think is the opposite direction of where Jeff
wants to
> go.

To mount the COWed file systems on the host using a LVM plugin
Yes inside the UML it uses up ubd devices instead of loop devices
currently only 8 are configurable, 16 possible with editing :(
but once the ubd driver is cleaned up it should be possible to
eventually have more ubd devices, my earlier patch was tested
with 400 ubd devices mounted at once, but by that point the
problems have already been solved.

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