ZFS on root booting broken somewhere after r270020

[Kimmo Paasiala]

On 18.8.2014, at 8.54, Kimmo Paasiala <kpaasial at icloud.com> wrote:

> 
> On 18.8.2014, at 2.32, Kimmo Paasiala <kpaasial at icloud.com> wrote:
> 
>> System is:
>> 
>> FreeBSD freebsd10.rdnzl.info 10.0-STABLE FreeBSD 10.0-STABLE #2 r270020: Fri Aug 15 20:38:59 EEST 2014     kimmo at buildstable10amd64.rdnzl.info:/usr/obj/usr/src/sys/GENERIC  amd64
>> 
>> This version still works fine. The one that didn’t work was r270097. The kernel boots but gets stuck at the line:
>> 
>> Trying to mount root from zfs:pool/ROOT/default []
>> 
>> I tried pressing enter at this point but got a panic, I don’t have a screenshot of the panic at the moment.
>> 
>> Could this problem be related the this commit? :
>> 
>> http://svnweb.freebsd.org/base?view=revision&sortby=rev&sortdir=down&revision=270095
>> 
>> -Kimmo
> 
> Trying to bisect this I backed to r270050 and that version still works. More to come.
> 
> -Kimmo

Version r270094 still works but commit r270095 definitely does break booting from ZFS on root on my system. The error message I see on the console is  “Mounting from <the ZFS filesystem> failed with error 5” and I’m given the mountroot prompt. I don’t see the ZFS pool among the listed GEOM devices on the mountroot prompt.

Adding the committer of r270095 (kib@) to this discussion.

-Kimmo
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