zfs: allow to mount root from a pool not in zpool.cache

[Andriy Gapon]

on 05/10/2012 20:42 Matthew D. Fuller said the following:
> On Fri, Oct 05, 2012 at 08:38:49AM +0200 I heard the voice of
> Pawel Jakub Dawidek, and lo! it spake thus:
>>
>> In my opinion requiring no zpool.cache to import root pool and mount
>> root file system is great idea and we should definiately do it.
> 
> As a user, I heartily agree.  I've setup a number of ZFS systems now,
> generally by booting up a live CD/USB/existing install on an extra
> drive, setting up and installing files, then unplugging the temp drive
> and letting it come up.
> 
> So far, I haven't yet _ever_ had it actually boot right the first
> time.  It keeps getting up to the root mount and failing.  I've always
> had to plug the other drive back in and "squirrel around" with
> zpool.cache until it works.  The last time, I believe it was because
> during the setup I had one NIC plugged in, and the "real" system used
> the other, so the hostid wound up different?  It's kinda like an
> adventure game, but the replay value is a bit low   8-}

So try the patch from the start of this thread :-)
It may to get it committed.

-- 
Andriy Gapon