Re: Freeze Upon /dev/fd0 Use

Linus Torvalds (torvalds@transmeta.com)
2 Sep 1998 04:03:27 GMT


In article <Pine.LNX.3.96.980901211921.32757G-100000@mirkwood.dummy.home>,
Rik van Riel <H.H.vanRiel@phys.uu.nl> wrote:
>On Tue, 1 Sep 1998, Alan Cox wrote:
>>
>> Thats very interesting indeed. Do you know what patchlevel (about) this
>> problem started ?
>
>Alan, don't bother. I have one of these no-name Triton boards
>and the problem is reproducible under DOS too. I have no doubt
>that OS/2 or Rhapsody will show the same behaviour...

Really? More than one active DMA at a time just killing the machine
completely?

The good news is that ISA DMA is broken anyway, and it might just be an
acceptable option to not even have a "BROKEN_DMA" config option, but
just unconditionally refusing to allow two concurrent ISA DMA streams.
The only things I know of that do ISA DMA is the floppy and old sound
cards, and if that means that the sound skips while accessing the floppy
I don't know if we really need to worry too much..

Linus

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