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Date:      Thu, 23 Jan 2020 21:29:19 +0100
From:      Michael Tuexen <tuexen@freebsd.org>
To:        Justin Hibbits <chmeeedalf@gmail.com>
Cc:        "powerpc@freebsd.org" <powerpc@FreeBSD.org>
Subject:   Re: panic: data storage interrupt trap when building world on PowerMac G5
Message-ID:  <F8284D1F-B8BD-43F4-A1CD-916E423076F7@freebsd.org>
In-Reply-To: <20200123134114.75d9c771@titan.knownspace>
References:  <7722F637-2C3D-4199-B2C9-F0616B0A5AE1@freebsd.org> <20200123134114.75d9c771@titan.knownspace>

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> On 23. Jan 2020, at 20:41, Justin Hibbits <chmeeedalf@gmail.com> wrote:
> 
> On Thu, 23 Jan 2020 12:32:03 +0100
> Michael Tuexen <tuexen@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".
Yes, you are right.
> 
> Is there a reason you still have kern.smp.disabled=1?  I fixed the bug
Without that, the fans get very loud, on reboot you get timeouts, and
I think (haven't tried recently) the network interfaces die. With that,
no such problems.

This is the first time I try to do a buildworld after moving to clang
(which was done by a reinstall). Before the switch, the machine did multiple
buildworlds and was running very stable.

Best regards
Michael
> for that (at least in head) back around May, or at least *a* bug for it.
> 
> - Justin




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