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home :: FreeBSD :: FB9.1panics

Wed, 03 Apr 2013

FreeBSD 9.1 panics resolved

A couple of weeks ago, I upgraded this small machine to FreeBSD 9.1. This is a small and very reliable Soekris net4810-50 box with 128 MB of RAM that has been running FreeBSD for years.

Since upgrading, it has been crashing daily around 03:00 with a panic message that I've finally captured today:

panic: kmem_malloc(4096): kmem_map too small: 38060032 total allocated

Some googling around let me to this thread from December 2012 on freebsd-stable.

which explains a similar situation. The recommendation in the thread is to add:

kern.cam.ctl.disable=1

to /boot/loader.conf to avoid loading the new CAM CTL device, which seems to require lots of RAM.

So, rax.org is back on its feet, hopefully with its usual stability. I'll write again if I encounter any further issues.

I have to say though that I am somewhat surprised that the GENERIC build of FreeBSD suddenly has significantly higher RAM requirements as of FreeBSD 9.1, though of course 128MB of RAM is small in today's world.

/FreeBSD | Posted at 02:10 | permanent link