Re: kernel panic, zone kalloc.8192 exhaustion

[Roland McGrath]

Like you said, I suspect both that there are Hurd leaks and 
that the limits in the kernel are tuned much too small.

You should run some something monitoring the memory usage and so forth.  I
don't know if vmstat is enough information.  You could also try writing
something that uses the mach_debug.defs interfaces and watch host_zone_info
et al and look for suspicious growth.  You might want to turn on ZONE_COUNT
in the kernel compile.