    Added support for VOP_FREEBLKS(), reducing MFS's impact on swap and     increasing performance by deallocating at least some of the backing     store when files are removed.
    Added support for VOP_FREEBLKS(), reducing MFS's impact on swap and
    increasing performance by deallocating at least some of the backing
    store when files are removed.

    Protect mfsp->buf_queue access at splbio().

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