ZFS import panic (kgdb backtrace attached)

[grarpamp]

On Mon, Jun 9, 2014 at 3:01 PM, Steven Hartland <killing at multiplay.co.uk> 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.