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Date:      Tue, 19 Aug 2014 10:46:43 +0300
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Kimmo Paasiala <kpaasial@icloud.com>
Cc:        "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>
Subject:   Re: ZFS on root booting broken somewhere after r270020
Message-ID:  <20140819074643.GU2737@kib.kiev.ua>
In-Reply-To: <99FB0662-1954-4ECB-939B-06D0AA49C1A1@icloud.com>
References:  <51AD1F36-1089-481F-8784-8BD8E6EF020F@icloud.com> <71DEB316-3CDD-4403-A397-BCE684725ABD@icloud.com> <25886C53-39C1-47A8-95F7-494FA6E7ABA2@icloud.com> <20140819071045.GS2737@kib.kiev.ua> <99FB0662-1954-4ECB-939B-06D0AA49C1A1@icloud.com>

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On Tue, Aug 19, 2014 at 10:32:08AM +0300, Kimmo Paasiala wrote:
>=20
> On 19.8.2014, at 10.10, Konstantin Belousov <kostikbel@gmail.com> wrote:
>=20
> > On Tue, Aug 19, 2014 at 07:40:46AM +0300, Kimmo Paasiala wrote:
> >>=20
> >> On 18.8.2014, at 8.54, Kimmo Paasiala <kpaasial@icloud.com> wrote:
> >>=20
> >>>=20
> >>> On 18.8.2014, at 2.32, Kimmo Paasiala <kpaasial@icloud.com> wrote:
> >>>=20
> >>>> System is:
> >>>>=20
> >>>> FreeBSD freebsd10.rdnzl.info 10.0-STABLE FreeBSD 10.0-STABLE #2 r270=
020: Fri Aug 15 20:38:59 EEST 2014     kimmo@buildstable10amd64.rdnzl.info:=
/usr/obj/usr/src/sys/GENERIC  amd64
> >>>>=20
> >>>> This version still works fine. The one that didn?t work was r270097.=
 The kernel boots but gets stuck at the line:
> >>>>=20
> >>>> Trying to mount root from zfs:pool/ROOT/default []
> >>>>=20
> >>>> I tried pressing enter at this point but got a panic, I don?t have a=
 screenshot of the panic at the moment.
> >>>>=20
> >>>> Could this problem be related the this commit? :
> >>>>=20
> >>>> http://svnweb.freebsd.org/base?view=3Drevision&sortby=3Drev&sortdir=
=3Ddown&revision=3D270095
> >>>>=20
> >>>> -Kimmo
> >>>=20
> >>> Trying to bisect this I backed to r270050 and that version still work=
s. More to come.
> >>>=20
> >>> -Kimmo
> >>=20
> >> Version r270094 still works but commit r270095 definitely does break b=
ooting from ZFS on root on my system. The error message I see on the consol=
e is  ?Mounting from <the ZFS filesystem> failed with error 5? and I?m give=
n the mountroot prompt. I don?t see the ZFS pool among the listed GEOM devi=
ces on the mountroot prompt.
> >>=20
> >> Adding the committer of r270095 (kib@) to this discussion.
> >=20
> > I have no idea about ZFS, but the fact that things, which are lower-lev=
el
> > than ZFS filesystem itself are missing, suggests that the issue is unre=
lated.
> > At the very least, start with providing the verbose boot dmesg for succ=
essful
> > and failed boots.
>=20
> This looks like to be unrelated to ZFS as you?re saying. I just remembere=
d that I?m loading fuse.ko in my /boot/loader.conf. I commented that one ou=
t and what do you know? The system boots fine with the r270095 kernel.
>=20
> Very very strange?=20
This probably indicates KBI mismatch.

Is your fuse.ko installed from the kernel build ?
Still, I think the verbose dmesg is the start to look.

>=20
> Thanks for the input anyway,
>=20
> -Kimmo
>=20
>=20
>=20



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