Fix for buildworld hang on XLR

[Neel Natu]

Hi JC,

On Tue, Feb 9, 2010 at 11:43 PM, C. Jayachandran
<c.jayachandran at gmail.com> wrote:
> Hi Randall,
>
> Looks like the buildworld hang was caused by a bug in the GMAC driver.
> In some cases an additional zero length descriptor was getting added
> to the descriptor list which makes the GMAC go into underrun
> condition.  Can you see if this fix works for you?
>
> The patch is at http://sites.google.com/site/cjayachandran/files/rge.c.diff
>
> I still get a crash in pmap_enter during buildworld after quite a long
> time. It seems that de-referencing the pte in some cases crashes. I'm
> looking at it.
>

How much memory do you have installed on your system? Is any of that
memory mapped above 512MB (physical)?

best
Neel

> Regards,
> JC.
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