Re: FreeBSD 8.0-BETA2/amd64 crashes on SMP under load

On Mon, Jul 27, 2009 at 10:04:28PM +0100, Anton Shterenlikht wrote:
> On Mon, Jul 27, 2009 at 09:55:12PM +0200, O. Hartmann wrote:
> > Kamigishi Rei wrote:
> > > O. Hartmann wrote:
> > >> I have the problem of crashing FreeBSD 8.0-BETA2/amd64 under load on
> > >> all of our SMP boxes. Is there an issue known at the moment? If not, I
> > >> will prepare the kernel for whitnessing and provide more informations,
> > >> if you wish.
> > > A quick question: what is in the crash message, i.e. the backtrace?
> > > And what kind of crash is it - a panic() or a fatal trap?
> > 
> > On the 8-core server box, I sometimes see :
> > 
> > Fatal trap 12: page fault while in kernel mode
> > fault code              = supervisor read, page not present
> 
> Not sure if it's related, but on ia64 SMP (2 cpus) with 8.0-current and
> later with 8.0-beta1 (I havent' built beta2 yet) I'm getting crashes
> under load every so often. E.g buildworld -j8 is likely to crash the
> box. No messages, just a sudden freeze, no backtrace or panic, and then reboot.
> 
> If load is less heavy, e.g. fewer processes and some idle time, the
> problem doesn't seem to appear.
> 
> I'm happy to do any further testing, if suggested.

my ia64 8.0-beta1 SMP box died again on
make -j8 buildworld
with no panic or log entries.

Is it possible that some kernel variable needs to
be increased? E.g. kern.maxproc, kern.maxfiles, etc.
Or perhaps I'm talking complete rubbish..


-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
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