Pilgrim, kadischi, and stateless (was Re: [Fedora-livecd-list] pilgrim livecd work)

[Bill Nottingham]

David Zeuthen (davidz at redhat.com) said: 
> Nope, I think it's much more elegant to just use dm-snapshot to provide
> a real rw rootfs. Not sure what Bill Nottingham (Cc'ed) or people
> working on stateless team thinks of this, they might have a number of
> good reasons that I haven't thought out. I still think stateless makes
> sense for non-livecd work however.

The reason we didn't use dm-snapshot is that it removes the security
benefits of readonly-root (after all, you don't need 99% of the system
to actually be read-write); moreover, you can't selectively apply it
(it has to be done at the whole block device level.)

> Btw, If someone could talk davej into including unionfs into the Fedora
> kernel, we'd use that instead of dm-snapshot and we'd have persistence
> more easily solved [1].

Flaming death. Deadlocks, oopses, etc. (it might be better now)

Bill