zfs discuss - Aug 2007 - Kernel panic receiving incremental snapshots

Before I open a new case with Sun, I am wondering if anyone has seen this
kernel panic before? It happened on an X4500 running Sol10U3 while it was
receiving incremental snapshot updates.

Thanks.


Aug 25 17:01:50 ldasdata6 ^Mpanic[cpu0]/thread=fffffe857d53f7a0: 
Aug 25 17:01:50 ldasdata6 genunix: [ID 895785 kern.notice] dangling dbufs
(dn=fffffe82a3532d10, dbuf=fffffe8b4e338b90)
Aug 25 17:01:50 ldasdata6 unix: [ID 100000 kern.notice] 
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112a80
zfs:zfsctl_ops_root+2fa59a42 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112ac0
zfs:dmu_objset_evict_dbufs+e2 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112af0
zfs:dmu_objset_evict+30 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112b10
zfs:zfsctl_ops_root+2fa5c0e1 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112b30
zfs:dbuf_evict_user+44 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112b60
zfs:zfsctl_ops_root+2fa4de31 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112b90
zfs:dsl_dataset_close+56 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112bb0
zfs:dmu_objset_close+1d ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112d20
zfs:dmu_recvbackup+5b5 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112d40
zfs:zfs_ioc_recvbackup+45 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112d80
zfs:zfsdev_ioctl+146 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112d90
genunix:cdev_ioctl+1d ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112db0
specfs:spec_ioctl+50 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112de0
genunix:fop_ioctl+25 ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112ec0
genunix:ioctl+ac ()
Aug 25 17:01:50 ldasdata6 genunix: [ID 655072 kern.notice] fffffe8001112f10
unix:sys_syscall32+101 ()
Aug 25 17:01:50 ldasdata6 unix: [ID 100000 kern.notice] 
Aug 25 17:01:50 ldasdata6 genunix: [ID 672855 kern.notice] syncing file
systems...
Aug 25 17:01:51 ldasdata6 genunix: [ID 904073 kern.notice]  done
Aug 25 17:01:52 ldasdata6 genunix: [ID 111219 kern.notice] dumping to
/dev/md/dsk/d3, offset 1645084672, content: kernel


-- 
Stuart Anderson  anderson at ligo.caltech.edu
http://www.ligo.caltech.edu/~anderson

Stuart Anderson wrote:
> Before I open a new case with Sun, I am wondering if anyone has seen this
> kernel panic before? It happened on an X4500 running Sol10U3 while it was
> receiving incremental snapshot updates.
Looks like it could be 6569719, which we expect to be fixed (in OpenSolaris) 
within a week.  We would need to take a look at your dump to verify.

--matt

This kernel panic when running "zfs receive" has been solved with
IDR127787-10.  Does anyone know when this large set of ZFS bug fixes
will be released as a normal/official S10 patch?

Thanks.


On Sat, Aug 25, 2007 at 07:36:25PM -0700, Stuart Anderson
wrote:
> Before I open a new case with Sun, I am wondering if anyone has seen this
> kernel panic before? It happened on an X4500 running Sol10U3 while it was
> receiving incremental snapshot updates.
> 
> Thanks.
> 
> 
> Aug 25 17:01:50 ldasdata6 ^Mpanic[cpu0]/thread=fffffe857d53f7a0: 
> Aug 25 17:01:50 ldasdata6 genunix: [ID 895785 kern.notice] dangling dbufs
(dn=fffffe82a3532d10, dbuf=fffffe8b4e338b90)
...

-- 
Stuart Anderson  anderson at ligo.caltech.edu
http://www.ligo.caltech.edu/~anderson

On Aug 25, 2007 8:36 PM, Stuart Anderson <anderson at ligo.caltech.edu>
wrote:
> Before I open a new case with Sun, I am wondering if anyone has seen this
> kernel panic before? It happened on an X4500 running Sol10U3 while it was
> receiving incremental snapshot updates.
>
> Thanks.
>
>
> Aug 25 17:01:50 ldasdata6 ^Mpanic[cpu0]/thread=fffffe857d53f7a0:
> Aug 25 17:01:50 ldasdata6 genunix: [ID 895785 kern.notice] dangling dbufs
(dn=fffffe82a3532d10, dbuf=fffffe8b4e338b90)
I saw "dangling dbufs" panics beginning with S10U4 beta and the then
current (May ''07) nevada builds.  If you are running a kernel newer
than the x86 equivalent of 125100-10, you may be seeing the same
thing.  The panics I saw were not triggered by zfs receive, so you may
be seeing something different.  An IDR was produced for me.  If you
have Sun support search for my name, you can likely get the same IDR
(errr, an IDR with the same fix - mine was SPARC) to see if it
addresses your problem.

-- 
Mike Gerdts
http://mgerdts.blogspot.com/