My attempt to solve the panic issue has failed. Even after clean installing of Snow Leopard with minimal set of 3rd-party software, the latest panic came when I wake up the machine this morning (that’s 10 minutes ago). Could it be a hardware issue?
Found more info regarding pmap.c …
* Remove a range of hardware page-table entries.* The entries given are the first (inclusive)* and last (exclusive) entries for the VM pages.
(I don’t know whether “unloaded kexts” has anything to do with this either.)