On my laptop I can repeat this panic: uvm_fault kernel: page fault trap stopped at _m_tag_delete_chain A trace shows: _m_tag_delete_chain _nfs_realign _nfs_receive _nfs_reply _nfs_request _nfs_readdirrpc _nfs_doio _nfssvc_iod _start_nfsio To repeat: cd /usr/src && make obj The fault occurs right after "===> lib/libc". This is with a custom kernel. I'm building a GENERIC kernel to try, too. // marc