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Date:      Wed, 27 Apr 2016 16:17:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-amd64@FreeBSD.org
Subject:   [Bug 209099] ata2: already running! panic: bad link elm 0xfffff80003b7e6a0 prev->next != elm
Message-ID:  <bug-209099-6@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209099

            Bug ID: 209099
           Summary: ata2: already running! panic: bad link elm
                    0xfffff80003b7e6a0 prev->next !=3D elm
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: furstenwerth@gmail.com
                CC: freebsd-amd64@FreeBSD.org
                CC: freebsd-amd64@FreeBSD.org

Created attachment 169760
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D169760&action=
=3Dedit
Image of Screen showing panic.

I have been battling a bug for about 4 months now. This has spanned
10.2-release, 10.3-release, 11-current. If I could get some assistance here=
 in
how to trace this problem I would gladly provide information.

Known Good State: FreeBSD 10.2-11-current, works flawlessly.
Bad State: Install py27-salt, run minions and or master.=20

Note: tested only on my hardware, but reproducible.=20

Steps to reproduce, run in ide compatibility mode or hardware that cannot do
AHCI.
Install FreeBSD 10.2-11-Current
Install py27-salt
run 'salt machine test.ping'
Machine will then report.
run 'salt machine state.apply test=3DTrue'
Everything reports properly
run 'salt machine state.apply'=20

Expected behavior is report back of success, observed behavior is kernel pa=
nic.

I get a very limited window that I can do any input to the machine. At this
time I cannot boot past starting jails as salt minion loads previously. I
cannot verify who this impacts, I cannot verify the extent of it as I have =
read
zero data regarding this specific to salt. I can replicate this, I can
reproduce it across multiple machines.=20

Changing one machine from AHCI to IDE will induce this as well, that machin=
e is
now stable for weeks without issue. Sadly the two machines that are causing=
 the
headache have no allocation for this due to age. I have tried 2 different S=
SD's
and 2 different spinners. The secondary machine does not have py27-salt
installed, months without panic. Install py27-salt and it starts panicking.

--=20
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