Date: Mon, 9 Jun 2014 21:29:18 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "grarpamp" <grarpamp@gmail.com>, <freebsd-fs@freebsd.org> Subject: Re: ZFS import panic (kgdb backtrace attached) Message-ID: <48A9B8D0A85E4088B6EB712173219681@multiplay.co.uk> References: <CAD2Ti29gKmED34S5z6NEUnaGOsx8m2uPEJiPWPZLcebJ6PD-mw@mail.gmail.com> <A2A7DF1F550D4691B84F4CE2903F1B31@multiplay.co.uk> <CAD2Ti2_DZqDbOnbwap-YrOEjavyRZ4H7JZ1r8mkk4_OPrYQEUg@mail.gmail.com>
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Can't say for sure, usually its a double fault panic for
stack issue, but worth eliminating as an initial step.
I would also consider moving to 10 from 8.4 tbh.
Regards
Steve
----- Original Message -----
From: "grarpamp" <grarpamp@gmail.com>
To: <freebsd-fs@freebsd.org>
Sent: Monday, June 09, 2014 9:15 PM
Subject: Re: ZFS import panic (kgdb backtrace attached)
> On Mon, Jun 9, 2014 at 3:01 PM, Steven Hartland wrote:
>> ZFS doesn't really like i386 due to the limited stack size
>>
>> So the first think I would try is increasing your kernel stack size:
>> options KSTACK_PAGES=4
>
> If it's not a genuine bug (ie: just the usual ZFS on i386 issues),
> I can move it to default x64 with 8GB in maybe a week.
>
> I forgot to include, this is stock GENERIC with:
> real memory = 2147483648 (2048 MB)
> vm.kmem_size=650000000
>
> I don't recall why I set kmem_size. And when wired
> mem gets above 600 things get unrecoverably slow and
> the box will lock/panic if I press on zfs at/above 600.
> With the 100 or so heavy write panics and a dozen+
> power cuts across multiple zfs/pool/bsd versions, I'm
> amazed I still have any readable zfs fs's at all.
>
> Anyway, posted in case it's a genuine bug.
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