panic: Lock vm object not exclusively locked @ /usr/src/sys/vm/vm_page.c:2637

[David Wolfskill]

On Sun, Apr 05, 2015 at 05:57:08PM -0500, Alan Cox wrote:
> ...
> > A> Just curious, amd64 or i386?
> >
> > Panics on amd64...., while building a kernel for i386, if that matters :)
> >
> 
> Maybe.  I didn't trip the assertion building amd64 kernels or world. 
> Maybe the difference is that the machine in question is still running a
> world from before the last clang update.
> ...

After enoountering the panic (twice), I built head/amd64 (starting from
stable/10/amd64); that built & booted without incident.

I then went back to head/i386 (different slice), ran "make clean", then
completely re-built world & kernel (in single-user mode, since it was
during the transition to multi-user mode that I encountered the panic),
while running:

FreeBSD  11.0-CURRENT FreeBSD 11.0-CURRENT #1561  r281106M/281106:1100067: Sun Apr  5 06:01:06 PDT 2015     root at g1-254.catwhisker.org:/common/S4/obj/usr/src/sys/CANARY  i386

On reboot, I was running:

FreeBSD  11.0-CURRENT FreeBSD 11.0-CURRENT #0  r281106M/281106:1100067: Sun Apr  5 11:54:52 PDT 2015     root@:/common/S4/obj/usr/src/sys/CANARY  i386

which still exhibited the panic.

When I noted that you had committed r28118, I hand-applied that,
rebooted to that last head/i386 (in single-user mode), and rebuilt
the kernel (only) -- with -DNOCLEAN.  The result:

FreeBSD g1-254.catwhisker.org 11.0-CURRENT FreeBSD 11.0-CURRENT #1561  r281106M/281106:1100067: Sun Apr  5 14:44:52 PDT 2015     root@:/common/S4/obj/usr/src/sys/CANARY  i386

survived the transition to multi-user mode successfully (which
promises to make tomorrow morning a bit less stressful for me).


All of this is done on the same hardware -- merely different slices
of the disk.  The machine has 8GB RAM, but only a bit less than
half of that would have been accessible to the i386 flavor (as I
am not attempting to do PAE).

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
Those who murder in the name of God or prophet are blasphemous cowards.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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