I am trying to upgrade a machine from 4.8-RELEASE with a GENERIC kernel to 4-STABLE with /usr/src and /usr/obj mounted via NFS on a Netapp (something I've done countless times, but not on this particular machine PIV 1.7Ghz + 1GB RAM). Twice, it's stopped the make buildworld at around this point: ... rm -f libm.so rm -f libm.so.* libm.so rm -f libm.a libm.so.2 rm -f .depend GPATH GRTAGS GSYMS GTAGS ===> lib/libmd ===> lib/libncurses and rebooted with the serial console showing the following page fault: Fatal trap 12: page fault while in kernel mode fault virtual address = 0xee60034c fault code = supervisor read, page not present instruction pointer = 0x8:0xc02c5d22 stack pointer = 0x10:0xe4227e30 frame pointer = 0x10:0xe4227e64 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 2981 (make) interrupt mask = none trap number = 12 panic: page fault Hints? Thanks, Adi