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Date:      Thu, 20 Sep 2018 19:27:38 +0200
From:      Michael Tuexen <tuexen@freebsd.org>
To:        Michael Schmiedgen <schmiedgen@gmx.net>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: 12.0-ALPHA6 dumps with 'Fatal double fault'
Message-ID:  <3F80F987-397C-4CF1-9421-BA1AF0376B6C@freebsd.org>
In-Reply-To: <8be8d63e-6f42-6350-eadb-c417496a1707@gmx.net>
References:  <b08b106f-b25a-1284-0e18-f186dd6baf4b@gmx.net> <ED35E1FA-CADD-4CDA-B5F0-0D8CC3FDA177@freebsd.org> <a37f1059-e54d-2384-40ed-54aef2e7c182@gmx.net> <00082772-8AA0-415B-A4C5-B8BC8D4D7BFC@freebsd.org> <8be8d63e-6f42-6350-eadb-c417496a1707@gmx.net>

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> On 20. Sep 2018, at 19:11, Michael Schmiedgen <schmiedgen@gmx.net> =
wrote:
>=20
> Hi Michael,
>=20
> many thanks for your help.
>=20
>=20
> On 20.09.2018 18:15, Michael Tuexen wrote:
>>> On 20. Sep 2018, at 17:12, Michael Schmiedgen <schmiedgen@gmx.net> =
wrote:
>>>=20
>>>=20
>>>> 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.
>>>=20
>>> 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.
>=20
> 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
I'm not referring to 11.1 or 11.2. Just the kernel you use with debug =
symbols.
> 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.
Removing SCTP means removing it from the kernel or disabling it in the =
port?
>=20
>=20
>> 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...
>=20
> The mentioned commit [2] lies exactly in my SVN update delta. So this =
could
> be the reason, too(?)
>=20
> Sadly I am to busy right now to investigate further, sorry.
OK. If you have some spare time, enable SCTP again and see if the =
problem
is related to it...

Best regards
Michael
>=20
> Thanks again,
>  Michael
>=20
>=20
>=20
> [1]
> =
https://lists.freebsd.org/pipermail/freebsd-current/2014-October/052900.ht=
ml
> =
https://lists.freebsd.org/pipermail/freebsd-stable/2014-December/081192.ht=
ml
>=20
> [2]
> =
https://lists.freebsd.org/pipermail/freebsd-current/2018-September/071283.=
html




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