[parisc-linux] Latest palinux crash -- VM problem?

[Matthew Wilcox]

On Sat, Sep 02, 2006 at 11:00:52PM -0600, Matthew Wilcox wrote:
> The memory error log indicates an uncorrectable error, unfortuantely I
> don't understand it enough to decode what it's saying.
> 
> Could it be a different manifestation of the same problem that bites
> PA8800?  That is, do we have the same address mapped twice and we're
> upsetting Astro by writing back cachelines that are supposed to be on
> the other CPU?
> 
> I should probably try to find Astro docs at some point so I can find out
> how much it cares about this kind of thing.

OK, got the Astro docs.  

> Error Status Reg           = 0x0000000000000010

This bit says that Astro observed a BROAD_ERROR transaction on the
Runway bus.  ie Astro didn't cause the error, it only noticed it and
went fatal in response.  It looks like CPU 0 sent the broadcast error,
so I need to try to figure out what made CPU 0 go funny.