Re: PROBLEM: 4.1.4 -- Kernel Panic on shutdown

[Ron Murray <rjmx@rjmx.net>]

On 08/05/2015 01:01 PM, Christoph Lameter wrote:
> On Wed, 5 Aug 2015, Peter Zijlstra wrote:
>
>> On Wed, Aug 05, 2015 at 11:32:31AM -0500, Christoph Lameter wrote:
>>> On Wed, 5 Aug 2015, Peter Zijlstra wrote:
>>>
>>>> I'll go have a look; but the obvious question is, what's the last known
>>>> good kernel?
>>> 4.0.9 according to the original report.
>> Weird, there have been no changes to this area in v4.0..v4.1.
> Rerunning this with "slub_debug" may reveal additional info. Maybe there
> is some data corrupting going on.
>
OK, tried that (with no parameters though. Should I try some?). That got
me a crash with a blank screen and no panic report. The thing is clearly
touchy: small changes in memory positions make a difference. That's
probably why I didn't get a panic message until 4.1.4: the gods have to
all be looking in the right direction.

One thing I did notice on the original report, though:

> [  OK  ] Deactivated swap /dev/dm-1.
> [  OK  ] Stopped ACPI event daemon.
> [  OK  ] Stopped LSB: Starts the GNUnet server at boot time..
> [  OK  ] Stopped LSB: start Samba SMB/CIFS daemon (smbd).
> [  OK  ] Stopped LSB: start Samba daemons for the AD DC.
>          Stopping CUPS Scheduler...
>          Stopping LSB: start Samba NetBIOS nameserver (nmbd)...
> [  OK  ] Stopped CUPS Scheduler.
> [  OK  ] Stopped (null).
> ------------[ cut here ]------------

Note the "Stopped (null)" before the "cut here" line. I wonder whether
that has anything to do with the problem, or is it a red herring?

 .....Ron

-- 
Ron Murray <rjmx@rjmx.net>
PGP Fingerprint: 0ED0 C1D1 615C FCCE 7424  9B27 31D8 AED5 AF6D 0D4A


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