panic: data storage interrupt trap when building world on PowerMac G5

[Michael Tuexen]

> On 23. Jan 2020, at 22:09, Francis Little <oggy at farscape.co.uk> wrote:
> 
> Hi,
> 
> Same here, with smp enabled, fans go full speed every 60 sec, probing
> sysctl calms them for a min.
> 
> buf*daemons time out shutting down and buildworlds fail.
Could you specify how buildworlds fail? Is the system panic'ing like mine?
On a Power9 system, buildworld works without a problem. But the system has
much more memory.

Best regards
Michael
> 
> Regards
> 
> 
> 
> On Thu, 23 Jan 2020 at 19:41, Justin Hibbits <chmeeedalf at gmail.com> wrote:
> 
>> On Thu, 23 Jan 2020 12:32:03 +0100
>> Michael Tuexen <tuexen at freebsd.org> wrote:
>> 
>>> Dear all,
>>> 
>>> when trying to build world on a G5 with SMP disabled
>>> (kern.smp.disabled=1 in /boot/loader.conf), I get the following panic:
>>> 
>>> http://bsd14.fh-muenster.de/crash.jpeg
>>> 
>>> It looks like this happens when memory is getting low (top was
>>> running until the machine panics). The machine runs the kernel from
>>> r356950.
>>> 
>>> Any idea what is going wrong?
>>> 
>>> Best regards
>>> Michael
>> 
>> That fault address looks very suspicious.  Reading it as hex encoding
>> of ASCII we get " user ad".
>> 
>> Is there a reason you still have kern.smp.disabled=1?  I fixed the bug
>> for that (at least in head) back around May, or at least *a* bug for it.
>> 
>> - Justin
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