Thu, Nov 25, 2004 at 08:47:24PM +0100, Manuel Bouyer:
> On Wed, Nov 24, 2004 at 04:42:09PM -0800, john heasley wrote:
> > I do not believe it is particular to a given CPU, but specific to some
> > work load.  For example; cause the file cache to use all the available
> > memory while doing a build, then run sync.
> > 
> > ATM, it appears that either something is trodding on pmap structures or
> > using them without initializing.  Could be locking, where some mapping
> > is released and something else tries to access it at the same time.
> 
> Hum, are registers from PCI devices in I/O space mapped using the pmap ?
> If so maybe it could explain a strange behavior on my U5 ...

afaik, yes, the space has to at least be reserved from any other uses.
whether these spaces are affected, i do not know.