> > With DMA enabled, the machine will freeze solid
> > without a trace at the first occurence of significant disk activity.
> > With DMA disabled, the same system runs fine for weeks on end.
>
> Known bug in the VP2 chipset.
> VP2 didn't last long if I remember right. VP3 came shortly after.
Okay, thanks for clearing that up. I'm not sure what the history of
the VP2 is (or was), but I do know quite a few folks using them. It'd
be a good idea to get this information more widely known, either by
blacklisting the DMA controller on this chipset, or by adding a
note to the linux/Documentation directory and to the menu help
information. Perhaps something along the lines of:
--- Configure.help~ Fri Sep 4 18:32:26 1998
+++ Configure.help Sun Sep 6 20:12:48 1998
@@ -438,7 +438,8 @@
If you suspect your hardware is at all flakey, say N here.
Do NOT email the IDE kernel people regarding this issue!
- It is nearly always safe to say Y to this question.
+ It is normally safe to answer Y to this question unless your
+ motherboard uses a VIA VP2 chipset, in which case you should answer N.
Other IDE chipset support
CONFIG_IDE_CHIPSETS
BTW, I tried Alan Cox's #define HAVE_REALLY_SLOW_DMA_CONTROLLER
soundblaster fix, just to see what would happen, and it didn't help.
Drats. No DMA for me.
-- John Kodis.
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