I want to bring this up again. I only got one confirmation from a macppc
user, and one deny from a i386 user.

The procedure is to make a mfs partition 600M or larger by mounting it,
and then copying something to it that is definately going to overfill
it. I reproduced this again this morning.

Net7300# mkdir /mfs
Net7300# mount_mfs -s 600m ffs /mfs
Net7300# cp -R /usr/* /mfs
panic: kernel diagnostic assertion "pcb->pcb_kmapsr == 0" failed: file
"../../..
/../arch/powerpc/powerpc/trap.c", line 546
Stopped in pid 371.1 (mount_mfs) at     netbsd:cpu_Debugger+0x10:
lwz r0, r1, 0x14
db{1}> bt
0xd521fc40: at panic+0x19c
0xd521fcd0: at __assert+0x28
0xd521fce0: at copyout+0x14c
0xd521fd70: at mfs_doio+0x84
0xd521fd90: at mfs_start+0xa8
0xd521fdd0: at sys_mount+0x414
0xd521fed0: at syscall_plain+0xc8
0xd521ff40: user SC trap #21 by 0x418839b8: srr1=0xf032
            r1=0xffffd990 cr=0x22000044 xer=0 ctr=0x418839b0

I can get this with -current GENERIC and GENERIC.MP. Are there a lot of
servers running /tmp as a large mfs?

tim