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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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