Subject: What's a bug? (was Re: booting with NCR3c875)
To: David Brownlee <>
From: Joerg Czeranski <>
List: port-alpha
Date: 04/30/1999 13:29:48
David Brownlee wrote:
> On Fri, 30 Apr 1999, Michael G. Schabert wrote:
> > If taking care with cables & terminations fixes instability, then it's not
> > the driver that's buggy.
> 	I beg to differ on that one. That is akinb to saying that if
> 	you consume all available VM and the machine hangs, its not the
> 	VM system that is buggy. 
> 	The hardware may be doing something 'incorrect', but its not
> 	entirely unexpected, and the driver _should_ be able to handle it.

I have to agree with that.

But: the VM system (of 1.3.3) *is* buggy. ;)

I started a dummy process that keeps allocating and using memory,
and after a while of swapping my box didn't respond anymore (no
echo on the rlogin connection, only ping answers) and kept swapping,
then some ten minutes later it froze.

Is 1.3.3 already using UVM?  And if not, can UVM cope with running out
of swap space?  Can it be configured to use eager allocation?

I intended to beta-test 1.4, but the SCSI disk and controller I ordered
for this haven't yet arrived.

My configuration: AlphaPC164 500MHz, 64MB RAM, 4GB IDE, 200MB swap.