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SubjectRe: linux 2.4.19-preX IDE bugs
On Wed, 12 Jun 2002, Andre Hedrick wrote:

> The hardware changed and the interrupt parser feature that stablized the
> old chipsets under SMP is gone. The new chipsets (20268 and above) do not
> have a location with sticky bits. So in some cases I expect things to go
> south, but in general they should not. Otherwise promise would be all
> over the issue.

Okay, thanks, that clarifies it, and if I read it right this may be a
permanent restriction. If the system is running noapic so the ints all go
to CPU0 does that help the situation? In a sane system I agree with Alan
that this is not a performance hit, or at least not significant.

> > On Wed, 12 Jun 2002, Alan Cox wrote:

> > > Then I suggest you give up computing, because PC hardware doesnt make
> > > your grade. BTW the general open promise bugs *dont* include data
> > > corruption so I suspect it may be your h/w thats hosed.

> Andre Hedrick
> LAD Storage Consulting Group

Guys, I wasn't questioning anyone's competence, just agreeing with the
original poster that if this is going to be an ongoing issue of stability
it might be held back for a version until there is time to either program
around it or characterize the conditions under which it causes problems.
And if that means that I can't trust it SMP, I don't think I'm a bad guy
to suggest the config drop the driver if SMP support is selected.

I don't mind moving a card to another system, and even if I didn't have
another system I would rather not take that particular risk. And if it
won't work reliably SMP then perhaps Promise should be taking some action.
There are SMP W2k machines out there, too.

bill davidsen <>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.

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