[Bug 209099] ata2: already running! panic: bad link elm 0xfffff80003b7e6a0 prev->next != elm

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Apr 27 16:17:50 UTC 2016


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

Created attachment 169760
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=169760&action=edit
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. 

Note: tested only on my hardware, but reproducible. 

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

Expected behavior is report back of success, observed behavior is kernel panic.

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. 

Changing one machine from AHCI to IDE will induce this as well, that machine 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 SSD's
and 2 different spinners. The secondary machine does not have py27-salt
installed, months without panic. Install py27-salt and it starts panicking.

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