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    SubjectRe: [CFT] Bus mastering support for IDE CDROM audio
    Andrew Morton <> wrote:
    > OK, Gents. Version three is at
    > This attempts to overcome the situation where a drive/controller
    > doesn't want to perform multiframe DMA, but is happy performing
    > single-frame DMA.
    > [...]

    The third patch works fine.

    When I'm doing "hdparm -c0 /dev/hdc" (16bit I/O) the system respond-ratio gets very low. (with all ide-cd-patches) I can see when gtk draws it's icons... But when I switch I/O back to 32 bit linux gets responsive again and cpu load decreases (~20%).

    Tested with 2.4.18-pre3-ac2 and 2.4.17-lowlat-ide.


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