FreeBSD 5.1-R kernel panic

Stephane Raimbault segr at
Wed Jul 23 08:24:37 PDT 2003

Thanks Bosko,

I've changed my /boot/loader.conf to reflect the kern.vm.kmem.size option.


As far as changing the nmbclusters, I'm not sure how many I use now.  Do you
know where I could get some values as what the total vs. how much is being
used for the above values?  I'll setup some graphs to monitor those values
for me and get an idea of how much the system is using and when if I can.

Also, I took a quick look at the developers handbook and couldn't find just
yet what I needed to change to the kernel to provide a stack trace... do you
know what options I should be adding to my kernel?  Also, should I try not
to use an SMP kernel and just run GENERIC to see if continues to have the
problem?  I can probably run on one CPU for a few days, especially over the


----- Original Message ----- 
From: "Bosko Milekic" <bmilekic at>
Newsgroups: mailing.freebsd.current
Sent: Wednesday, July 23, 2003 9:14
Subject: Re: FreeBSD 5.1-R kernel panic

> On Wed, Jul 23, 2003 at 09:08:18AM -0600, Stephane Raimbault wrote:
> ...
> > I was looking at uping the kern.vm.kmem.size as suggested to do as well,
> > I cannot find that value in sysctl -a, so I'm not sure where to set that
> > specifically.  I have found the value for nmbclusters and it is set to
> > following:
>   It's a boot-time tunable.  Look at /boot/defaults/loader.conf and copy
>   over the relevant line with a setting such as, for example, 350000
>   into your /boot/loader.conf.  Increasing nmbclusters will not help you
>   here.  In fact, if you're not running out, I would recommend keeping
>   the value reasonable (e.g., 8192).
> > kern.ipc.nmbclusters: 25600
> >
> > I guess short of setting the kern.vm.kmem.size I need to get someone
> > the stack trace leading to the crash... is there a URL that someone can
> > point me to for me to set the box up for this?  I'll dig around in the
> > developers handbook, I seem to remember seeing something about it in
> >
> > Thanks,
> > Stephane.
> ...
> -- 
> Bosko Milekic  *  bmilekic at  *  bmilekic at
> TECHNOkRATIS Consulting Services  *
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