This happened again. I'm pretty sure this is related to heavy disk I/O
as the first panic was trigged by

   rsync -avr --delete p130:/home/ /backup/home

and now one of the users was cleaning his Cyrus inbox with 84000+ mails...

panic: pmap_get_physpage: out of memory
Begin traceback...
uvm_fault(0xffff8000c60a55a8, 0x4000659000, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff804c979b cs 8 rflags 10246 cr2  4000659000 cpl d 
rsp ffff8000c69b06f0
panic: trap
Faulted in mid-traceback; aborting...
dumping to dev 4,1 offset 8390079
dump 4095 4094 4093 4092 4091 4090 4089 4088 4087 4086 4085 4084 4083 4082 4081


Martti