Because buffers may be tossed and recreated at will under the new VM system, the mapping from logical to physical block number may be lost. Hence we have to check for a reconstituted buffer and redo the call to VOP_BMAP if the physical block number has been lost.
Because buffers may be tossed and recreated at will under the new VM
system, the mapping from logical to physical block number may be lost.
Hence we have to check for a reconstituted buffer and redo the call to
VOP_BMAP if the physical block number has been lost.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase