RE: PYXIS machine check

["Greg Lindahl" <glindahl hpti com>]

> I think this is more likely a programming problem.  This error
> can be caused by accessing non-existent memory.  The pyxis chip
> ECC checking is mainly done when non-processor accesses are
> occurring, such as PCI bus master DMA, and getting a double bit
> error is very unlikely if you have not gotten any single bit
> errors.  Other things which can cause it are PCI bus parity
> errors and PCI bus time-outs.

This is all well and good, but we should be clear that you're talking about
programming errors in the kernel and drivers, and this guy never said that
he didn't get any single bit errors.

A user program will get a kernel fault if it accesses non-existent memory.

-- g