Re: MP kernel doesn't boot

[Johan A. van Zanten <johan%giantfoo.org@localhost>]

Michael Lorenz <macallan%netbsd.org@localhost> wrote:
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> 
> Hello,
> 
> On May 2, 2008, at 15:21, Michael-John Turner wrote:
> > On Fri, May 02, 2008 at 12:54:44PM -0400, Michael Lorenz wrote:
> >> Well, the SM50 lacks a cache controller and thus doesn't have any  
> >> cache
> >> coherency support. The question should be why did it work in 2.0  
> >> in the
> >> first place.
> >
> > Interesting - I didn't realise that. I ran a system with a pair of  
> > SM50s
> > and it was rock solid with 2.0 with an SMP kernel.
> 
> The CPU has tiny L1 caches, gcc3 probably generated code that  
> thrashed the caches enough to avoid coherency issues by accident.


I opened a PR about what i think is the same issue in Jan of 2007 for
NetBSD 3.1_STABLE:

http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=35363

(it's still marked as open)

 -johan