Date: Wed, 09 Dec 2020 07:48:35 +0100 From: "Kristof Provost" <kp@FreeBSD.org> To: Peter <pmc@citylink.dinoex.sub.org> Cc: freebsd-stable@freebsd.org Subject: Re: Panic: 12.2 fails to use VIMAGE jails Message-ID: <36BBA671-835F-435B-AF79-0E82FE57C6E8@FreeBSD.org> In-Reply-To: <X9Ao%2BBKDXADds36A@gate.oper.dinoex.org> References: <20201207125451.GA11406@gate.oper.dinoex.org> <39DBEA53-960F-4D70-86D7-847E6DFA437D@FreeBSD.org> <20201207233449.GA11025@gate.oper.dinoex.org> <DDDE7802-1C8C-4EB7-AA0C-DFCD7E5D2BAB@FreeBSD.org> <X8/Kr0td1cxI%2BP%2BV@gate.oper.dinoex.org> <1AAE98C9-ADF9-4869-B863-601542CEBB67@FreeBSD.org> <X9Ao%2BBKDXADds36A@gate.oper.dinoex.org>
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On 9 Dec 2020, at 2:31, Peter wrote:
> On Tue, Dec 08, 2020 at 08:02:47PM +0100, Kristof Provost wrote:
>
> ! > Sorry for the bad news.
> ! >
> ! You appear to be triggering two or three different bugs there.
>
> That is possible. Then there are two or three different bugs in the
> production code.
>
> In any case, my current workaround, i.e. delaying in the exec.poststop
>
>> exec.poststop = "
>> sleep 6 ;
>> /usr/sbin/ngctl shutdown ${ifname1l}: ;
>> ";
>
> helps for it all and makes the system behave solid. This is true
> with and without Your patch.
>
> ! Can you reduce your netgraph use case to a small test case that can
> trigger
> ! the problem?
>
> I'm sorry, I fear I don't get Your point.
> Assumed there are actually two or three bugs here, You are asking me
> to reduce config so that it will trigger only one of them? Is that
> correct?
>
No, we need a simple case to reproduce these problems. It’s fine if
that test case triggers multiple issues.
> Then let me put this different: assuming this is the OS for the life
> support system of the manned Jupiter mission. Then, which one of the
> bugs do You want to get fixed, and which would You prefer to keep and
> make Your oxygen supply cut off?
>
> https://www.youtube.com/watch?v=BEo2g-w545A
>
Happily we’re not in space.
>
> ! I’m not likely to be able to do anything unless I can reproduce
> ! the problem(s).
>
> I understand that.
> From Your former mail I get the impression that you prefer to rely
> on tests. I consider this a bad habit[1] and prefer logical thinking.
>
<snip nonsense>
> (Background: It is not that I would be unwilling to create clean and
> precisely reproducible scenarious, But, one of my problems is
> currently, I only have two machines availabe: the graphical one where
> I'm just typing, and the backend server with the jails that does
> practically everything.
>
These issues should trigger just fine in VMs. There’s no need for
hardware pain.
Regards,
Kristof
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