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

[David Wolfskill]

On Sun, Apr 05, 2015 at 10:47:03AM -0700, David Wolfskill wrote:
> ...
> > Either this, or vm_page_advise() could be changed to do nothing in the
> > case of MADV_DONTNEED operation and a need to call vm_page_dirty(), if
> > the object is only read-locked.
> 
> I have since managed to build & (successfully) boot:
> 
> s3:FreeBSD g1-254.catwhisker.org 11.0-CURRENT FreeBSD 11.0-CURRENT #0  r281106M/281106:1100067: Sun Apr  5 09:57:39 PDT 2015     root at g1-254.catwhisker.org:/common/S3/obj/usr/src/sys/CANARY  amd64
> 
> So I'm about to try re-building the i386 head (and be sure that
> it's quite "clean" in the process).  (I had seen the panic for i386
> twice out of two attempts, so I'm reasonably certain it wasn't a
> fluke.  But it could be something "weird" in my head/i386 environment,
> as that is the only one where I've had a problem with today's builds
> & smoke-tests.  I'm using both i386 & amd64, and both stable/10 and
> head -- 4 combinations; one for each of 4 slices on the same
> hardware.)
> ....

So... as advertisd, I cleaned things up (rather explicitly), rebuilt
world & kernel, installed kernel & world... and the panic recurred.

I have a fresh(er) crash dump; I've placed a copy of core.txt.4 in
<http://www.catwhisker.org/~david/FreeBSD/head/>.

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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