Re: 8.0RC2 amd64 - kernel panic running make buildworld

Am Tue, 10 Nov 2009 19:05:23 +0200
schrieb Andriy Gapon <avg_at_icyb.net.ua>:

> on 10/11/2009 17:22 gary.jennejohn_at_freenet.de said the following:
> > Well, OK, I may have misinterpreted what you wrote or have chosen
> > bad wording myself to convey the same message.  Nonetheless it
> > looks like a hardware problem to me.
> 
> [Trying to make up for my previous mistake.]
> 
> The symptom certainly looks like misbehaving hardware, but other
> information from the reports seems to suggest that it is possible
> that this misbehavior might be caused by software misconfiguring the
> hardware.

Hi.

This thread was started by me. In the meantime I filed a PR:
http://www.freebsd.org/cgi/query-pr.cgi?pr=140338 
 
> I would re-test vm.pmap.pg_ps_enabled=0 just to be sure that it was
> correctly teh first time.

I toggled vm.pmap.pg_ps_enabled three times between reboots and the
result is always the same. superpages enabled: reboot, superpages not
enabled: server stable

> I would try to see how 8.0-RC1 kernel behaves and in general try to
> find last working, first non-working version.
8.0RC1, 8.0BETA4 already showed the same behaviour

> It would be useful to know any (if any) non-default loader.conf and
> rc.conf settings or kernel config (if not GENERIC).

loader.conf untouched, rc.conf had just settings for networking active
when testing. In the end I enabled some other stuff to have it ready for
8.0 RELEASE, *after* I found out that disabling superpages helped
against the crashes.

Ah yes. I also ran memtest86 on the server for about half a day - no
problems.

But read for yourself in the PR.

I don't rule out that this behaviour with vm.pmap.pg_ps_enabled maybe
hardware related, but why then is the server running stable
with RELENG_7 and memtest and server diagnostics don't report any
problem? 

--Kai.


-- 
I am NOMAD!