ZFS on root booting broken somewhere after r270020

[Kimmo Paasiala]

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
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