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Date:      Tue, 5 Feb 2019 17:44:09 +0300
From:      "Andrey V. Elsukov" <bu7cher@yandex.ru>
To:        Pete French <petefrench@ingresso.co.uk>, freebsd-stable@freebsd.org
Subject:   Re: More CARP issues under 12
Message-ID:  <49a5ec49-a8d4-2d13-bc94-c8a7cc41fadd@yandex.ru>
In-Reply-To: <E1gk6e5-000LXV-A3@dilbert.ingresso.co.uk>
References:  <E1gk6e5-000LXV-A3@dilbert.ingresso.co.uk>

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From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
To: Pete French <petefrench@ingresso.co.uk>, freebsd-stable@freebsd.org
Message-ID: <49a5ec49-a8d4-2d13-bc94-c8a7cc41fadd@yandex.ru>
Subject: Re: More CARP issues under 12
References: <E1gk6e5-000LXV-A3@dilbert.ingresso.co.uk>
In-Reply-To: <E1gk6e5-000LXV-A3@dilbert.ingresso.co.uk>

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On 17.01.2019 15:19, Pete French wrote:
> so, having got a workaround for yesterdays problems, I now went to upgr=
ade my
> other pair of boxes using CARP. No 'pf' on these, just one shared addre=
ss.
> This is the setup I have tested in development and it works fine.
>=20
> I install the new kenel and do the first reboot - and I get the panic
> below. Maybe its not carp related, but seems suspicious as the last
> thing it spits out is a carp message.
>=20
> Fatal trap 12: page fault while in kernel mode
> cpuid =3D 0; apic id =3D 00
> fault virtual address   =3D 0x28
> fault code              =3D supervisor read data, page not present
> instruction pointer     =3D 0x20:0xffffffff80ca0de1
> stack pointer           =3D 0x28:0xfffffe00004da740
> frame pointer           =3D 0x28:0xfffffe00004da760
> code segment            =3D base 0x0, limit 0xfffff, type 0x1b
>                         =3D DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
> current process         =3D 12 (swi4: clock (0))
> trap number             =3D 12
> panic: page fault
> cpuid =3D 0
> time =3D 1547727391
> KDB: stack backtrace:
> #0 0xffffffff80be8597 at kdb_backtrace+0x67
> #1 0xffffffff80b9ccf3 at vpanic+0x1a3
> #2 0xffffffff80b9cb43 at panic+0x43
> #3 0xffffffff8107382f at trap_fatal+0x35f
> #4 0xffffffff81073889 at trap_pfault+0x49
> #5 0xffffffff81072eae at trap+0x29e
> #6 0xffffffff8104e1a5 at calltrap+0x8
> #7 0xffffffff80ca0ce6 at ether_output+0x6b6
> #8 0xffffffff80d0bda4 at arprequest+0x4c4
> #9 0xffffffff80d0d9fc at garp_rexmit+0xbc
> #10 0xffffffff80bb6ba9 at softclock_call_cc+0x129
> #11 0xffffffff80bb7089 at softclock+0x79
> #12 0xffffffff80b60e79 at ithread_loop+0x169
> #13 0xffffffff80b5e012 at fork_exit+0x82
> #14 0xffffffff8104f18e at fork_trampoline+0xe
> Uptime: 19s

Hi,

What branch and revision do you use? Can you install gdb and then obtain
this information:

# kgdb

(kgdb) list *ether_output+0x6b6

--=20
WBR, Andrey V. Elsukov


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