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Date:      Sun, 13 Nov 2016 12:41:07 +0300
From:      "Andrey V. Elsukov" <ae@FreeBSD.org>
To:        "O. Hartmann" <ohartmann@walstatt.org>
Cc:        karels@FreeBSD.org, FreeBSD CURRENT <freebsd-current@freebsd.org>, glebius@FreeBSD.org
Subject:   Re: was: CURRENT [r308087] still crashing: Backtrace provided
Message-ID:  <4f23664d-f3bc-e7c7-e529-92b84a4dcd37@FreeBSD.org>
In-Reply-To: <20161113102352.6edbf89d@thor.walstatt.dynvpn.de>
References:  <alpine.GSO.1.10.1610231515170.5272@multics.mit.edu> <20161029163336.46bb24c4.ohartman@zedat.fu-berlin.de> <20161030013345.GC67644@raichu> <20161030082525.6fb6d8a4.ohartman@zedat.fu-berlin.de> <20161030163934.GA49633@raichu> <20161030185500.64e57233.ohartman@zedat.fu-berlin.de> <20161030182509.GA1491@charmander> <20161105184509.28d162f1@thor.walstatt.dynvpn.de> <20161105203748.GD63972@wkstn-mjohnston.west.isilon.com> <20161106111356.39850d7e@thor.walstatt.dynvpn.de> <20161108182829.GA62725@wkstn-mjohnston.west.isilon.com> <4b9812b8-ab5b-ff78-01bf-1dc99b1a72d0@FreeBSD.org> <20161113102352.6edbf89d@thor.walstatt.dynvpn.de>

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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
To: "O. Hartmann" <ohartmann@walstatt.org>
Cc: karels@FreeBSD.org, FreeBSD CURRENT <freebsd-current@freebsd.org>,
 glebius@FreeBSD.org
Message-ID: <4f23664d-f3bc-e7c7-e529-92b84a4dcd37@FreeBSD.org>
Subject: Re: was: CURRENT [r308087] still crashing: Backtrace provided
References: <alpine.GSO.1.10.1610231515170.5272@multics.mit.edu>
 <20161029163336.46bb24c4.ohartman@zedat.fu-berlin.de>
 <20161030013345.GC67644@raichu>
 <20161030082525.6fb6d8a4.ohartman@zedat.fu-berlin.de>
 <20161030163934.GA49633@raichu>
 <20161030185500.64e57233.ohartman@zedat.fu-berlin.de>
 <20161030182509.GA1491@charmander>
 <20161105184509.28d162f1@thor.walstatt.dynvpn.de>
 <20161105203748.GD63972@wkstn-mjohnston.west.isilon.com>
 <20161106111356.39850d7e@thor.walstatt.dynvpn.de>
 <20161108182829.GA62725@wkstn-mjohnston.west.isilon.com>
 <4b9812b8-ab5b-ff78-01bf-1dc99b1a72d0@FreeBSD.org>
 <20161113102352.6edbf89d@thor.walstatt.dynvpn.de>
In-Reply-To: <20161113102352.6edbf89d@thor.walstatt.dynvpn.de>

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On 13.11.2016 12:23, O. Hartmann wrote:
>>>>> Great, thank you. I would first like to confirm that r307234 is ind=
eed
>>>>> causing the crash - since it appears to be easy to trigger, that sh=
ould
>>>>> be faster. If not, the core will help track down the real problem. =
=20
>>>>
>>>> Although I was under the impression the in-kernel-config option
>>>>
>>>> makeoptions    DEBUG=3D-g
>>>>
>>>> would make debugging symbols available, I'm proved wrong. =20
>>
>> Do you have option FLOWTABLE in your kernel config?
>=20
> Would you suggest to disable this feature in the kernel? Or does the fe=
ature, by
> accident, influence the debugging ??

Hi,

I never used FLOWTABLE, but as I know, when L2 caching was reintroduced
the kernel with enabled FLOWTABLE has started crashing almost
immediately. glebius@ added workaround in r300854 to prevent the panic.
Then we discussed with him that the change in in_pcb.c should be
reasonable. And he decided to revert the workaround. Now it seems
without r300854 FLOWTABLE isn't usable.

--=20
WBR, Andrey V. Elsukov


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