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    SubjectDMA Mapping???
    Hi,

    Our ethernet driver performance is not so good in
    powerpc machines. I have attached a link for a patch
    and brief description below, which talks about
    alignment of dma memory for rx and tx buffers.
    So my question is, Will there be increase in
    performance on powerpc machines if I also align my
    tx/rx dma pointers?????



    Description:
    PCI bridge peculiarities mean the insufficiently
    aligned DMAs perform terribly on Power4 hardware. This
    hack copies and realigns packets to improve
    performance.


    http://oss.software.ibm.com/linux/patches/?patch_id=881


    Please mail me at rajuraghava@yahoo.com

    Cheers
    Raghav.



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