FreeBSD 6.x CVSUP today crashes with zero load ...
Marc G. Fournier
scrappy at hub.org
Mon Jun 26 15:12:32 UTC 2006
On Mon, 26 Jun 2006, Robert Watson wrote:
>
> On Mon, 26 Jun 2006, Marc G. Fournier wrote:
>
>>> I'm also running 6.x on several dual-PIII without problems. An issue
>>> local to Marc's setup is definitely indicated. Given the failure mode, I
>>> would be worried about a potential hardware issue, although subtle
>>> hardware and subtle system software problems are sometimes difficult to
>>> distinguish.
>>
>> Well, I've been trying to do it 'the hardway' ... went back to the original
>> kernel, and am slowly upgrading forward ... I'm currently running a June
>> 15th kernel with none of the problems that I was seeing before ... I'm just
>> in the process of running my third 'make -j3 buildworld' on this kernel,
>> and its clean ... going to go forward to June 22nd next, see if that too is
>> clean *cross fingers*
>
> I think this is a useful activity, especially if you've already run extensive
> memory testing on the box. If you haven't yet done that, I encourage you to
> take a break from buildworld's and make sure the memory tests pass. I spent
> several months on and off trying to track down a bug a few years ago, which
> turned out to be a one bit error in memory on the box. It would appear and
> disappear based on how the memory page was used -- for debugging kernels, it
> consistently got mapped to padding in the kernel's bss. For non-debugging
> kernels, it typically manifested in other usable kernel momory. Changes in
> kernel versions would move the bit around kernel memory and user memory,
> resulting in hard to debug failure modes. I wish I'd run the memory test
> earlier, but the lesson is clear!
Is there something that I can run *from* FreeBSD, remotely, to do this?
----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email . scrappy at hub.org MSN . scrappy at hub.org
Yahoo . yscrappy Skype: hub.org ICQ . 7615664
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