pmap_emulate_reference() panics still ongoing

[Wilko Bulte]

On Wed, Apr 28, 2004 at 10:16:00AM -0400, Andrew Gallatin wrote:
> 
> Ruslan Ermilov writes:
>  > On Wed, Apr 28, 2004 at 08:39:11AM -0400, Andrew Gallatin wrote:
>  > > 
>  > > Ruslan Ermilov writes:
>  > >  > Andrew,
>  > >  > 
>  > >  > This is with latest src/sys/alpha/alpha/pmap.c,v 1.146.
>  > >  > 
>  > >  > db> where
>  > >  > Debugger() at Debugger+0x38
>  > >  > __panic() at __panic+0x228
>  > >  > pmap_emulate_reference() at pmap_emulate_reference+0x15c
>  > >  > trap() at trap+0x3dc
>  > >  > XentMM() at XentMM+0x2c
>  > >  > --- memory management fault (from ipl 0) ---
>  > >  > --- user mode ---
>  > > 
>  > > Damn.  Did the change make it any worse for you?
>  > > 
>  > No, I can't say this made things any worse.  ;)
> 
> Good.
> 
>  > This is not a very fast runner (166MHz EV4, 64MB RAM, swap
>  > is used).  Since I've upgraded it to 5-CURRENT, running the
>  > GENERIC kernel, my 5 attempts to build world ended up with
>  > this panic (often the panic message was unreadable, this one,
>  > after I've upgraded kernel to the latest pmap.c, was probably
>  > a good exception).  Now I've built the debug version of the
>  > kernel.  Will it be of some help?
> 
> Wow, and I thought my 600MHz ev67 was slow.  At least you can

This is a true-blue NoName LCA EV4 board ;)

>  > (Hardly relevant, but it was happy running 4.10-RC.)
> 
> Very relevant -- it means the bug is new to 5.x

Which also proves that having some older hardware around helps
testing.

-- 
Wilko Bulte				wilko at FreeBSD.org