Re: netbsd-7 LOONGSON kernel doesn't work

A 6.99.43 kernel running with a 6.99.40 userland worked quite well.
After updating the userland to 6.99.43, programs would trigger a TLB
miss trap in the same manner described here:

  http://mail-index.netbsd.org/port-mips/2014/12/22/msg000609.html

At first it was 'tar' (probably) as I was attempting to run 'etcupdate'.

On reboot, it gets as far as:

[...]
Clearing temporary files.
pid 235(find): trap: cpu0, TLB miss (load or instr. fetch) in kernel mode
status=0x8400ffa3, cause=0x8, epc=0xffffffff8025c4e0, vaddr=0x70
tf=0x980000008109f5a0 ksp=0x980000008109f6e0 ra=0xffffffff8025c448 ppl=0xbe726d00
kernel: TLB miss (load or instr. fetch) trap
Stopped in pid 235.1 (find) at  ffffffff8025c4e0:      lw       v0,112(v0)
db> bt
0x980000008109f6e0: 0+ffffffff8025c4e0 (ffffffff80670000,ffffffff80650000,1,1ebd1e0a7e00) ra 0 sz 0
User-level: pid 235.1
db> sync
syncing disks... spurious isa interrupt 1
spurious isa interrupt 1
spurious isa interrupt 1
spurious isa interrupt 1
[...]
[forced power off]


Since I've already rolled my sources forward to 6.99.44, I'll go ahead
and build kernels to see if they will complete booting, then likely roll
back and build older userland (if my saved 6.99.40 kernel will still
run with the 6.99.43 userland).

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