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    SubjectRe: 2.6 vs 2.4 regression when running gnomemeeting
    On Sat, Dec 20 2003, Matthias Andree wrote:
    > On Sat, 20 Dec 2003, Nick Piggin wrote:
    >
    > > >/dev/hda:
    > > >multcount = 0 (off)
    > > >IO_support = 0 (default 16-bit)
    > > >unmaskirq = 0 (off)
    > > >using_dma = 1 (on)
    > > >keepsettings = 0 (off)
    > > >readonly = 0 (off)
    > > >readahead = 256 (on)
    > > >geometry = 65535/16/63, sectors = 117210240, start = 0
    > > >
    > >
    > > This might be a problem - try turning unmaskirq on, and possibly
    > > 32-bit IO support on (hdparm -u1 -c1 /dev/hda). I think there is
    > > a remote possibility that doing this will corrupt your data just
    >
    > Does 32-bit I/O support make a difference for DMA transfers at all or
    > just for PIO?

    It's just for PIO.

    --
    Jens Axboe

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