# [OmniOS-discuss] kernel panic - anon_decref

Saso Kiselkov skiselkov.ml at gmail.com
Fri Nov 15 16:17:46 UTC 2013

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    On 11/15/13, 5:39 AM, wuffers wrote:
    > So I'm adding VMware hosts (ESXi 5.5)  to my OmniOS ZFS SAN, which are
    > already hosting some volumes for our Windows 2012 Hyper-V
    > infrastructure, running over SRP and Infiniband. In VMware, I had
    > uninstalled the default Mellanox 1.9.7 drivers and installed the older
    > 1.6.1 drivers along with OFED 1.8.2. I had no issues adding the new
    > initiator to the target group, and creating a new host group and view
    > for the host - after which the volume automagically showed up as expected.
    >
    > I formatted using VMFS5, and started creating a VM, attaching an ISO and
    > loading up Windows Server 2012 R2. Somewhere during the install, I had
    > my first kernel panic and I had to reboot the SAN as it was during
    > business hours (couldn't wait for the dump to finish). Later that night
    > I reproduced the issue (just loading up VMs, and trying out a VMware
    > converter job) and was able to get a proper dump (which is now sitting
    > in my /var/crash/unknown, ~7GB).
    >
    > Screenshots:
    > http://i.imgur.com/nGakKyS.png?1
    > http://i.imgur.com/wIx0g6J.png?1
    >
    >
    > TIME                           UUID
    > SUNW-MSG-ID
    > Nov 14 2013 22:13:46.926077000 a4432472-983c-ca82-a231-d1b468a3a91a
    > SUNOS-8000-KL
    >
    >   TIME                 CLASS                                 ENA
    >   Nov 14 22:13:46.8830 ireport.os.sunos.panic.dump_available
    > 0x0000000000000000
    >   Nov 14 22:12:33.1029 ireport.os.sunos.panic.dump_pending_on_device
    > 0x0000000000000000
    >
    > nvlist version: 0
    >         version = 0x0
    >         class = list.suspect
    >         uuid = a4432472-983c-ca82-a231-d1b468a3a91a
    >         code = SUNOS-8000-KL
    >         diag-time = 1384485226 890408
    >         de = fmd:///module/software-diagnosis
    >         fault-list-sz = 0x1
    >         fault-list = (array of embedded nvlists)
    >         (start fault-list[0])
    >         nvlist version: 0
    >                 version = 0x0
    >                 class = defect.sunos.kernel.panic
    >                 certainty = 0x64
    >                 asru =
    > sw:///:path=/var/crash/unknown/.a4432472-983c-ca82-a231-d1b468a3a91a
    >                 resource =
    > sw:///:path=/var/crash/unknown/.a4432472-983c-ca82-a231-d1b468a3a91a
    >                 savecore-succcess = 1
    >                 dump-dir = /var/crash/unknown
    >                 dump-files = vmdump.0
    >                 os-instance-uuid = a4432472-983c-ca82-a231-d1b468a3a91a
    >                 panicstr = anon_decref: slot count 0
    >                 panicstack = fffffffffbb2fa18 () | genunix:anon_free+74
    > () | genunix:segvn_free+242 () | genunix:seg_free+30 () |
    > genunix:segvn_unmap+cde () | genunix:as_free+e7 () | genunix:relvm+220
    > () | genunix:proc_exit+454 () | genunix:exit+15 () | genunix:rexit+18 ()
    > | unix:brand_sys_sysenter+1c9 () |
    >                 crashtime = 1384482703
    >                 panic-time = Thu Nov 14 21:31:43 2013 EST
    >         (end fault-list[0])
    >
    >         fault-status = 0x1
    >         severity = Major
    >         __ttl = 0x1
    >         __tod = 0x5285916a 0x3732d048
    >
    > While getting the Hyper-V hosts up on IB and SRP I had issues with the
    > Windows hosts but never with the SAN box, and they have now been running
    > stable for 3+ months until the kernel panic today. I saw some other
    > anon_decref bugs, but those were in 2007-2008 and have already been
    > rolled into OmniOS. I'm pretty sure I was on the original r151006, and
    > now am on the latest r151006y, in hopes it's already taken care of. I'll
    > try other things to see if I can reproduce on the latest build.
    >
    > In the meantime, does anyone want to take a look at the dump?

    So, just to clear up, the SAN box is also running inside VMware? Or is
    it on real hardware?

    Cheers,
    --
    Saso

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