Date: Mon, 18 Jul 2016 10:58:07 -0700 (PDT) From: Don Lewis <truckman@FreeBSD.org> To: avg@FreeBSD.org Cc: freebsd-current@FreeBSD.org Subject: Re: zfs solaris assert panic in 11.0-ALPHA5 r302256 Message-ID: <201607181758.u6IHw7h6047690@gw.catspoiler.org> In-Reply-To: <831f819b-68bb-5425-a4cf-47a51a136ddf@FreeBSD.org>
index | next in thread | previous in thread | raw e-mail
On 18 Jul, Andriy Gapon wrote:
> On 18/07/2016 20:40, Don Lewis wrote:
>> On 18 Jul, Andriy Gapon wrote:
>>> On 08/07/2016 07:13, Don Lewis wrote:
>>>> My package buiding machine just crashed with this panic during a
>>>> poudriere run:
>>>>
>>>> panic: solaris assert: (dn->dn_phys->dn_nlevels == 0 && db->db_level == 0) || dn->dn_phys->dn_nlevels > db->db_level || dn->dn_next_nlevels[txgoff] > db->db_level || dn->dn_next_nlevels[(tx->tx_txg-1) & TXG_MASK] > db->db_level || dn->dn_next_nlevels[(tx->tx_txg
>>>
>>> Don,
>>>
>>> do you have a crash dump?
>>> It would be interesting to see a pretty-print of dn, dn->dn_phys, db and
>>> tx in the frame where the assert is hit.
>>
>> I do. Unfortunately kgdb reports that the values of dn and db were
>> optimized out.
>>
>
> Well... You can try to use kgdb7111 from ports, perhaps it would work
> better. Also, it's often possible to find values of wanted variables by
> finding a relevant value that's not optimized out and then following
> through pointers, etc to get to the right values. in other cases it's
> possible to get the values by examining the disassembly and values of
> registers.
This is with kgdb from ports:
[snip]
#13 0xffffffff824be23a in assfail (
a=0x80 <error: Cannot access memory at address 0x80>,
f=0xfffffe085a435d90 "", l=0)
at /usr/src/sys/cddl/compat/opensolaris/kern/opensolaris_cmn_err.c:81
#14 0xffffffff8215b928 in dbuf_dirty (db=<optimized out>, tx=<optimized out>)
at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c:1232
#15 0xffffffff8215c0e4 in dbuf_dirty (db=<optimized out>, tx=<optimized out>)
at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c:1383
#16 0xffffffff8215c0e4 in dbuf_dirty (db=<optimized out>, tx=<optimized out>)
at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c:1383
#17 0xffffffff82166fd9 in dmu_write_uio_dnode (dn=<optimized out>,
uio=<optimized out>, size=<optimized out>, tx=<optimized out>)
at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c:1193
#18 0xffffffff82166e92 in dmu_write_uio_dbuf (zdb=0xfffff806bacc0b88,
uio=0xfffffe085a4368f0, size=65536, tx=0xfffff803a4043600)
at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c:1244
#19 0xffffffff82224bac in zfs_write (vp=<optimized out>, uio=<optimized out>,
ioflag=<optimized out>, cr=<optimized out>, ct=<optimized out>)
[snip]
There's not a lot for me to get traction with ...
This is also not a very repeatable thing for me. I've only had it
happen once even though this machine is kept very busy building ports.
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201607181758.u6IHw7h6047690>