freebsd stable - Nov 2006 - panic in swap_pager_swap_init (amd64/smp/6.2-pre)

I tried to upgrade an amd64x2 box from "FreeBSD 6.1-STABLE #36: Mon Sep
4 11:22:15 EDT 2006" to "FreeBSD 6.2-PRERELEASE #1: Mon Nov 13
10:01:57
EST 2006" and found that a newly built kernel panics on boot and locks
up solid after printing:
SMP: AP CPU #1 Launched!
panic: failed to create swap_zone.

A few reboots later I also discovered that:
- GENERIC (UP) kernel works fine;
- SMP kernel fails in the same way;
- my kernel (a stripped down SMP) with "options SMP" removed works;
- my kernel with SMP enabled and either -v or -d (followed by cont)
  works.
("works" in the last case is defined as: I could upgrade gnome
2.14->2.16 with buildworld -j2 going at the same time)

old dmesg:	http://www.omut.org/~lxv/bbox-dmesg-20060824
new dmesg (-v):	http://www.omut.org/~lxv/bbox-dmesg-20061113-v
kernel config:	http://www.omut.org/~lxv/bbox-GENERIC-BBOX

Any advice is greatly appreciated.

Thank you,
--
Alex.

On Mon, Nov 13, 2006 at 11:36:01PM -0500, Alex Vasylenko
wrote:
> I tried to upgrade an amd64x2 box from "FreeBSD 6.1-STABLE #36: Mon
Sep
> 4 11:22:15 EDT 2006" to "FreeBSD 6.2-PRERELEASE #1: Mon Nov 13
10:01:57
> EST 2006" and found that a newly built kernel panics on boot and locks
> up solid after printing:
> SMP: AP CPU #1 Launched!
> panic: failed to create swap_zone.
> 
> A few reboots later I also discovered that:
> - GENERIC (UP) kernel works fine;
> - SMP kernel fails in the same way;
> - my kernel (a stripped down SMP) with "options SMP" removed
works;
> - my kernel with SMP enabled and either -v or -d (followed by cont)
>   works.
> ("works" in the last case is defined as: I could upgrade gnome
> 2.14->2.16 with buildworld -j2 going at the same time)
That's quite odd, since afaik boot -v doesn't change any behaviour
apart from some printfs.  Is this still repeatable, i.e. it didn't in
fact go away after you rebuilt your kernel from scratch during the
course of the above testing?

Kris
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