12.0-ALPHA6 dumps with 'Fatal double fault'

[Michael Schmiedgen]

Hi Michael,

many thanks for your help.


On 20.09.2018 18:15, Michael Tuexen wrote:
>> On 20. Sep 2018, at 17:12, Michael Schmiedgen <schmiedgen at gmx.net> wrote:
>>
>>
>>> Can you elaborate which port was triggering the fault and which platform you are using?
>>> I would like to reproduce the issue and fix it.
>>
>> Port is devel/apr1 and platform is amd64.
> Works fine on my side. It would be helpful if you could build a kernel with
> debug symbols, reproduce the problem and provide a stack strace.

Unfortunately I cannot. It is a production machine without debug that does not
like to run on 11.1 OR 11.2 for some strange reason [1]. And I really do not
want to run it on 11.0 anymore. Perhaps it is some crappy hardware from our
hoster, I don't know. Anyway, after minimal-updating SVN to very-latest and
removing SCTP it behaves just fine under load.


> Since you said that it crashed multiple times makes me wonder if this problem
> is related to SCTP in particular or if there is some other generic issue...

The mentioned commit [2] lies exactly in my SVN update delta. So this could
be the reason, too(?)

Sadly I am to busy right now to investigate further, sorry.

Thanks again,
   Michael



[1]
https://lists.freebsd.org/pipermail/freebsd-current/2014-October/052900.html
https://lists.freebsd.org/pipermail/freebsd-stable/2014-December/081192.html

[2]
https://lists.freebsd.org/pipermail/freebsd-current/2018-September/071283.html